I changes according to the post, though synergies weren't changed. I have to rush somewhere now.

Will go over your post after I get out of class later. I see plenty of information there; I just don't have the time atm to ACT on it (literally 5 minutes before class starts).

It's pretty okay. The build is fine though the cheatsheet is very oddly formated. In the summoner spell section you completely misunderstood the point of taking ignite, though. Fluffed up some of the guide too (to fluff up is to add meaningless information for the purpose of your guide seeming more in-depth), for example SS chapter mentioning that exhaust is good versus AS reliant junglers and vs AS reliant ADCs rather than vs AS reliant champions (cuz it's good for vs Tryndamere, Jax and so). Anyway you can kind of tell you don't use ignite a lot cause you don't take it vs sustain lanes or with early game comps, exactly. Point of ignite is to get as many kills as possible for your AD early and mid game so that he can carry harder in late game. Taking exhaust when taking ignite is not a good idea (only vs AS reliant champions, high burst assassins and unfavorable match-ups). You're keeping this section very bot lane oriented lol, you need exhaust because of late game and teamfights not because the enemy ADC needs peel from the other ADC in lane.

Um anyway you have a lot of empty space in your guide. You can crop out the top part of the offense and defense mastery trees rather than having the whole thing take up so much space, for example. Don't think you need spoilers in the warding chapter. You shouldn't need a Split Push thing for this guide. Preparing for a gank can be put in the early game chapter instead. it isn't an advanced tactic in my opinion. Neither is zoning really. All of these things should be moved into early game chapter. If you want something "advanced" add a section for roaming.

MF makes a very good lane with Blitz actually I've no idea why you'd say otherwise. You grab them, E them and she ults. If you're fed enough there's no way for them to get outta that. She can kill stuff before 6 anyway, especially with ignite. Twitch, Varus are high synergy too imo. As well as Draven. Anything high-kill is good, really.

I think this was a great build and I have little to no complaints whatsoever. It's a great guide so i'm giving it a +1.

If I posted every combination of lane, it'd be a nightmare. Even if I did it with a table of matchups, there would be a lot of tables and not a lot of description on what you should be aiming for in each lane. Especially considering the "triumvirate" of supports (poke, sustain, kill) has fallen to pieces.

Maybe I could designate roles as part of the description? Like Miss Fortune would be (specifically) anti-sustain, but Varus would be poke.

It'd be really complicated. I'd be happy to look into it, but I don't even know where to start.

I was thinking. It'd be better if you created combos vs combos in your matchup section since it's so very dependent on both champ picks. You could make some sort of chart or just write them out. (if you write them, maybe make a small ToC)

Like Blitzcrank/ Graves is generally good but not against Caitlyn/ Zyra.

Randuin's Omen added.

Lane synergy/opposition updated.

"Rare" supports hidden under spoiler tags.

lol brain fart....1 point.....forget i said that.

Mana Barrier is no exchange for health since it's based on current mana and not maximum. Also 2 mana per level is good?! In what universe is that useful?

Extra items modification pushed. Dropped Iceborn Gauntlet and Twin Shadows for Mikael's Blessing.

I'll get to synergy/opp changes after dinner.

I'll change the excess items to Mikael's Blessing and Frozen Heart. You said earlier that Blitzcrank probably won't be focused, meaning the aura from Frozen Heart is better than the passive on Randuin's Omen. Also, it technically does give health due to Mana Barrier; it gives half as much when compared to Randuin's Omen, but it also gives 20% CDR. The 25 armor is more or less negligible.

And summarizing the changes for champions:
{Synergy}
Draven → medium (already has high burst, needs peel)
Ashe → low (can't burst at all, would rather poke)
MF → medium (lockdown is good post-6)
Cait → low (would rather have someone to peel + poke with)
Sivir → medium (high burst damage)
Varus → medium (can probably get one round of Blight off)
Vayne → low (needs someone to protect her)

{Support Opposition}
Janna → high (lots of disruption in her kit, plus can amplify ally's poke damage)
Karma → rarely seen
Kayle → low (easy to grab)
Lux → rarely seen
Nami → high (pretty good at kiting, passive makes it difficult to land hooks)
Sona → depends on elo; good Sona can position well, bad Sona is delicious
Taric → low (only has one peel, so just focus carry to remove from Shatter passive)
Zilean → rarely seen

{Carry Opposition}
Draven → medium (has an interrupt, is typically played with a partner that counters Blitz)
Ashe → no change (add "beware kiting")
MF → medium (make sure you position yourself to interrupt her ult)
Varus → medium (good at poking, which is big weakness to melee supps)

while i always respect your opinion GMD you are essentially saying that Mana Barrier is worthless and you are better off going armor/health over armor/mana. i would say the gain in mana barrier balances out the gain of health from randuin's.

i can see why you would say Twin Shadows is bad but consider that it reveals people in jungle and slows them...making pulls so easy a cave man could do it...obviously wards cover this also...and probably are more cost effective but they act differently...not a core item by any means but certainly a consideration as an optional.

yes flat are typically better than scaling and Mikael's Blessing should be mentioned.

not sure if i would say Expanded Mind is worthless on blitz...maybe less effective than improved recall but again it feeds the passive as well as your ability to spam pulls early game before you build mana.