I play Poppy top, Hybrid/Trinity AD. You generally wanna lane against AD champs top, she does really well against them because of how much ridiculous early game armor she can get with her w, along with runes/masteries/armor + 5 pots. If you face anyone else, grab regrowth + a pot.
If you're totally outlaning your opponent and get an early kill, spring for sheen as fast as you can. If you're airing on the cautious side, a philo stone is recommended. You want to get to your trinity as fast as possible, which means staying in lane as much as you can for as long as you can. Farm, farm, farm. Don't forget your boots(Ninja Tabi or Mercs only, really) and once you have your sheen, start harrassing with your q a lot.
I reccomend 9/21 with flat dmg reduction, flat armor, flat HP, movement speed buffs. In the offense tree, I get flat AD, CDR, and 10% Magic pen, because of how her q works.