She does not gain MR from her W, and the reasoning behind the high armor is because Poppy is played best as an anticarry, and to survive an encounter with a fed AD Carry, you need the armor. And the armor comes from Randuin's and Ninja Tabi, Randuin's gives you a precious slow while focusing down the carry, and allows for the support to build Locket of Iron Solari, and the Ninja Tabi is just an early game item that carries into late game very well.

poppy is no tank, y so much armor?!
plus, she gain armor and magic resist from w so she needs helth

I apologize to anyone who is attempting to use the guide but sees the items and masteries being bugged. I have checked the code, and even redone both sections, but it seems that it is either extremely bugged or broken and I don't know how to fix it.

Does anyone else see weird masteries, skill sequence, ands item sequence? I want to know if it just on my side.

Merc treads are more ideal in my mind but other than that I believe its a good guide

Thumbs up! I understand the use and need of an unorthodox rune and mastery set up, Poppy can't be effective if she can't keep her own on top(Gold, serviving as well and dealing damage, and just being a bully). There are a few champions that are better off with a different R&M set up then that of the standard Mobafire Guides, Poppy is at the top of that list. I think if someone where to play poppy with this guide(and I do) with the deep understanding of poppy that you need just to play her, you would be much better off. I fully support the use of Boots of Swiftness with the tenactiy item as it does put Poppy in a much better spot as far as being harder to kite. I might change some things like the Quints for maybe more AD or PEN, Im not sure how much that would impact her GP5 and burst. Other then that, I think you nailed it on the head! Thanks for this guide!

I am not going to defend my choices as I am going to clarify a few things for my build.

Betazoid: The Boots of Swiftness and Eleis'a Miracle are cheap, very cheap compared to the Merc. Tread + Shurelya's combo. This build is already very gold heavy. Eleisa's + Boots of Swiftness is 2300g, while Shurelya's + Mercs is 3400g. There is a big gold diffence for almost the exact same purpose. Both reduce the amount of kiting that happens to me, and both reduce the CC on me. Howerver 1100g is a third of a blood thirster or 95g short of my zeal for triforce. And why buy Shurelya's when it is one of the most popular items for any support?

Cursedjix: Thank you for the advice and I will get right on that. And yes I agree that 15722 gold doesn't come every game.

Both: You both made comments about the masteries, first off thank you both again for your input. The masteries and runes go hand in hand. The masteries are geared towards an AD Bruiser on top. 70%+ of all games they will outfarm you because most of them have built in AOE or farming capabilities where as Poppy does not. The masteries are geared towards helping your damage you need to give the hit back, take the hit and regen the HP and act like nothing happened, and be able to compete or beat them in gold. The points in the Utility tree are very precise. The mana is there for constant mana problems, the MS is there to help you avoid getting kited, the gold per 5 and exp boost are key.

Lets do a little math and comparison:
With the gold per 5 quints and masteries, I get a free 600 gold per ten minutes, that means a minimum of 1110 per game(first 1:30 no income). If you are only 21(10 melee, 10 caster, 1 siege) cs below the enemy solo top at the ten minute mark, you are still 100 gold+ ahead of them. It may not seem like much, but they have to make the choice between buying those health pots where as you do not. This means they have to not buy their full Sheen or next mid game item to buy the health pots to sustain. Where you can buy that full Sheen and not have to worry about the sustain. And the experience is taken to help you beat him in levels and dominate your lane even more.

Your Guide is alright but there could be many improvements such as:
Show alternative builds(Thats not the only way to build her, what should you build if your not doing too well because i guarentee you that 15722 gold is not going to come by each match. Also you have 6 points in w. Btw ghost is also good on poppy but thats my personal preference.)
Masteries: You might want full defense or offensive because tbh ur wasting points scattering them in all three trees.
Solo Top: More info is needed on match ups tbh because you can't really say just try to survive top when nearly everyone crushes her top. Maybe put a section dedicated to what to do in some match ups.

Other than that it was an alright guide but alot of improvements need to be made. I wont downvote yet since you can change and edit the guide.

ok, boots of swiftness won't do much for you, better off grabbing either merc treads or ninja tabi. elysa's miracle is a waste of an item slot. gold per 5 quints aren't going to help either, armor pen much more useful. the masteries are also quite disjointed for poppy. no cooldown reduction or attack speed is also going to hurt your damage output, if you want bloodthirster to be effective you need some sort of attack speed.