Rune pages 1 and 2 are practically the same thing. I think you could pick the generalized best/most common used page between those 2 and cut out the complexity. Just because other options might also work, doesn't mean that people need to be shown them in the cheatsheet, it will be better to explain them inside of the guide instead.

Your notes for the standard spells are a bit too simple, yes it’s indeed true that it’s the most typical spell for Yuumi, but why? What reason makes these spells good for her, just saying they’re the most used doesn’t really tell readers very much.

ADC’s doesn’t really take Ignite so no need to include that. Most of them would rather take Cleanse or Exhaust. Notes for these spells also seem a bit weirdly worded but it’s only a minor issue. Maybe also include the Heal/Ignite version as an “alternate 2” considering it’s also a popular option.

When it comes to your builds I feel like you could divide them up into a full example build of 6 items for each build and then situational items that you could also run at the end. It would look better than to just have every item listed next to each other on the same row. For example, would you really buy Stirring Wardstone as the last item, why does the damage-oriented build include an elixir but the healing-oriented one does not, stuff like that.

Haven’t seen the untouchable tank build nor the ap nuke build ever used on Yuumi so I don’t necessarily think they’re worth showing. They’re experimental builds so it does make it more reasonable, but I just don’t think a tanky yuumi will be worth it since you won’t have any damage, sure you won’t die but you also won’t be able to do anything else, likewise for the ap nuke one you become really squishy, you’re also not a carry either so going for such a heavy ap build also doesn’t make much sense since I don’t think you’ll be able to get to that point in the game were it becomes useful.

I have seen the Everfrost build though so that one’s fine, though building Rylai's Crystal Scepter is very questionable. It isn’t built ever according to stat sites so wondering about your thoughts on it?

Are there starting items for Yuumi? I would imagine it’d be a good idea to explain what items you’re starting with since it’s the first thing you buy when a game starts, such as Spellthief's Edge. If you’d like, since your builds are divided into 2 item groups, you could also just include starting items & maybe the most common example build she uses right before the first item group starts. To make it make more sense, your first item group is called “Standard Support” within that group is your 2 oriented builds. So maybe put starting items & an example build before that, but don’t have them in an item group or it’ll become confusing.

According to stat sites, Q > E > W is the most used ability order where you level Q at level 1, then 2 points into E, then 1 point into Q at level 4 and then max E then Q and wait to level W until last. I don’t see this ability order out of the 3 ones you have, any thoughts about it? The healing-oriented one seems a bit too over the place, but that might just be me. Also again the lack of notes, you include one for the damage-oriented one, but otherwise you don’t have any.

I think the main thing your cheatsheet suffers from is the lack of good notes. Some of your notes barely have any information within them which doesn’t give readers all too much to work with. You’ve done a much better job with the notes for your item builds but for stuff like ability orders/summoner spells & rune pages, it’s lacking a bit.

As for threats, is Viego really useful support? I haven’t seen him once in that role, can’t imagine he’d be all too much of a threat tbh as an ADC myself, same goes for Rammus, Anivia, Gnar, Diana etc. I’m pretty sure what you’ve done here is list threats from all roles, which I don’t think is really necessary since most of your time as a support will be spent botlane considering Yuumi isn’t all too much of a roaming support, so it’ll probably be better to just include the support & adc threats. I also feel like there are more threats than these?

Braum might not be much of a threat towards you, but will likely be a threat to the one you’re attached to because of the passive, just to mention. It's one of the reasons why Lucian & Braum is such a deadly duo.

When it comes to synergies it’s fine if there are ones that aren’t specifically for supports or adcs, but if you’re going for more generally then it might even be better to include more of them as there are more champions than just 46 and some champions will work extremely well with a Yuumi attached to them in any situation.



I like the choice of banners a lot, looks really nice, but they’re not consistent at all. You use them for Introduction, Why Yuumi? and Abilities which is great, but then there’s the sections such as Threats & Synergies, Summoner Spells, Runes, Items, Experimental, Laning etc. you get my point.

When it comes to the divider for the Introduction part, you could extend the width for it to make it completely cover the entire page so it’s not awkwardly cut off. For example:


I think it would be better to have the TLDR for Teams text underneath the Synergies & Threats for the table of contents considering it looks very off when the first one is inconsistent with the other 2 and there’s just an out of place “TLDR for Teams” text underneath the builds. Could also move that tldr for teams section from being the last one, to being underneath synergies & threats but before summoner spells.



Abilities

The only problem I have with this section is that most of the descriptions are very cramped up, it’s very hard to distinguish what part of the description explains what the ability actually does and what description explains what you can use the ability for. For example:

Hard to see that only the final sentence here is the description of what you’ll use the ability for. The rest of it is to explain what the ability does.

I honestly would just color them differently, here’s some sort of quick example:

If you want the code for it:

For some of the ability descriptions you don’t have any descriptions to explain what you can use the ability for, only what it does which the tooltip also explains, such as the passive, the E & the R ability.

Synergies & Threats

This section is pretty good already, though could probably be elaborated more. Maybe you could also divide up the first paragraph into 2 where one is to talk about the botlane specific problems & synergies, and the other one is to talk about the problems/synergies outside of botlane such as with what you mentioned about sustainers like Sett.

Summoner Spells

Like I mentioned with your cheatsheet, most adcs don’t really pick Ignite, it’s quite useless. If it’s needed to pick another spell other than Heal, then it’s more worthwhile to pick Cleanse or Exhaust. Also not worth it for the adc to get ignite if you’re going to pick it anyhow.


Runes

If the only reason to pick Nullifying Orb is to use for URF then I don’t see the need to have it there at all, if it’s not useful for her then there’s no point. It’s automatically picked for all champions in urf regardless so it’s not like it’s going to give her many benefits there.

Little bit weird that some descriptions are inconsistent here. For example in your description about Cut Down/ Coup de Grace, you have both descriptions for both runes right next to eachother, but then in your description about Transcendence/ Scorch, you have an odd space between both descriptions, any reason why?

You can actually link the rune shards if you want. So for example where you have “adaptive force” you could do:

and it’ll get a nice icon, like this: adaptive force.

Here's a quick little code that has all of the icons you can use for the stat shards if you'd like:

I do like this section overall.


Itemization

Kinda weird that a lot of empty space is between the icons and the text, which makes the text a bit worse since it goes more downwards then to have the ability to take up more space on the width rather than the height.

If you’re mentioning that Relic Shield is not worth it or not needed, then why mention it at all? If you’re going Spellthief's Edge in 99% of games anyways, those 1% of games where you’re not running it, you’ll be better off with a Control Ward start to be fully honest.

Also again where you mention starting items here, but they’re nowhere to be found inside of your cheatsheet at the top.

Your note for Moonstone is weird to me. If you were to have a terrible early laning phase and forced to back early then why not buy Ruby Crystal? If all you have is 400g anyways then it’s way better to get that slight bit of health than to not get anything at all. If you’re saving to buy a Kindlegem anyways then buying the ruby crystal will just make the kindlegem price lower from 800g > 400g so you’d have to still get another 400g to buy the kindlegem anyhow which you could achieve on your 2nd back, and on top of that you still get 150 health, rather than saving it for seemingly no reason and being 150 health lower as a Yuumi who is very squishy by default.

Here we have the same thing again, you mention that Locket of the Iron Solari is not an optimal pick. If this is the case, why even include it?

You talk about Shurelia's but it’s nowhere to be found in your cheatsheet and there’s no build shown that makes any use of it. Even though you mention it’s good against enemies that benefit from movement speed, your readers won’t really know when to actually run it or what build is good together with it.

Can’t see any descriptions in the Legendaries section talking about Rabadon's Deathcap or Shard of True Ice. Whilst both items are quite obvious picks, it will benefit to explain why they are. For example, if a new reader comes to the guide, why would they feel the need to buy Deathcap on a squishy support like Yuumi? Also the fact that you run your support item every game, and might even sell it later on for another item, so maybe it’d be good to have a description explaining the good uses of it.

Stirring Wardstone is also not legendary, only common. If you want the legendary variation then you should change the icon to Vigilant Wardstone. People will be able to understand that you’ll need to get Stirring before being able to upgrade it as the recipe has it as its lowest item.

You explain shortly about Seeker’s and Verdant, though I don’t really see these 2 items being something that Yuumi buys and stat sites don't show that either. Upgrading them to a banshee’s or zhonya’s is definitely not needed and buying them in of itself feels like a waste of gold that could be put into something more useful instead. Considering you’ll be sitting on allies for most if not the entirety of the game, buying these 2 items isn’t really necessary. During the times where you detach from your ally, if they die for example, you’ll 99% be dead anyways, these items won’t really save you much tbh.

Final Chapters

I think the final sections of the guide are really good. Though most of it is a lot of text, the gameplay aspects are solid and does give a good grasp of how to play support, which is nice.