regrowth pendant -> philosopher stone -> sorc boot -> Mejai -> Death Cap -> Rylai or Void(depends) -> Rylai or Void(which one you didn’t build) -> Lichbane -> pot up as much as possible. Malady is a waste of space, you never going to auto attack as teemo, most you going to get off is 1-2 shots plus a Q.
The trick with playing AP teemo is mushroom placement. if enemy team decided to go all banshee, you need to place 2 mushrooms close together, with about 2 steps apart, so they hit the first one which remove their veil, and then before they can laugh at you in all chat, they step in the 2nd one.
if you playing mid lane, it’s all about predicting where they will run or go. example is placing shroom in top and bottom bush of the mid lane.
---- OIIIIIIIIIIIIIIIIIIO-----
#IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII#
#IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII#
#IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII#
0IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII0
#IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII#
#IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII#
#IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII #
----OIIIIIIIIIIIIIIIIIII 0-----
that’s the basic placement for middle lane. O = shroom and # is the bush, - = river wall. Most people when they trip a shroom in the bush will either ignore it and go straight for you, or trying to run towards their towers. either way, they will hit an another shroom on the way to you or to their tower.
I usually place another shroom direct infront of the bush shroom, in case you were close to their tower, while you are retreating and they trying to adjust their course to intercept you, they will hit the one in the middle again.
Also some shroom you plant are not for stepping on but for small sight range, like shrooming their red or blue, you place shroom in location that you hope they won’t step on, but still give you sight into red or blue which can set up for some nice ganks. usually I take ghost and ignite(ignite wins you early lane fight). but there are a few games I took ghost and teleport. managed some nice ganks in middle when one of their squishy is pushing mid lane, I can teleport to a shroom literally right behind him and unload on him.