I figured that the stacking trinity forces thing was just frostshot's odd sense of humour at work. Poppy's weakness (in SR at least) is farming up enough to be effective, so she can't really afford to waste gold on redundant stats - she needs an efficient build without an ounce of fat on it.
Spamhappy/Zekent and Malmortius have played more Poppy than most - they seem to agree on getting an early philosopher's stone, followed by a sheen. Trinity Force is core, filling out the rest of the build according to the situation - a typical 6-item final build would be mercury treads, trinity force, shurelya's reverie, hextech gunblade, infinity edge and quicksilver sash.
Spamhappy's guide:
http://solomid.net/guides.php?g=16923Malmortius's guide:
http://solomid.net/guides.php?g=6671 In Dominion, you get to bypass the minion farming part of the game, without this weakness Poppy is always a force to be reckoned with. My current Dominion build for Poppy is as follows:
- start with boots, pickaxe and one healing potion
- prioritise a bilgewater cutlass. The ranged slow will let you grab a bunch of kills you might otherwise miss (if you were relying on a phage, say).
- I go for sorceror shoes to enhance my Q damage (which I level up first), but merc treads and ionian boots of lucidity are both good alternatives to consider.
- Sheen is next. For the major part of the game, you will rely on this core of sorc shoes, cutlass and sheen - 4185 gold's worth of highly effective hybrid items - better than a trinity force, I would suggest. I challenge anyone to figure out a better build for this amount of gold!
- Finish the hextech gunblade, finish the trinity force and add a maw of malmortius to the mix, not necessarily in that order.
- Dominion games hardly ever last long enough to finish a 5th and 6th item, so I could really say anything at this point. Infinity Edge and Phantom Dancer would be uncontroversial choices. Capping CDR for an even more spammable Q is also worth considering.