AP and when to build him tank? I usually build him AP, but sometimes I feel like I get deleted by the ennemies before being able to do much. Or, well, I don't know. I guess I feel like I build him wrong most of the time, since I lose most of the time..With him or with another champ.
+ feast = why are you getting deleted? 
Edit: there should never be a point that you don't have both AP and tankiness on cho.
Tankier if your team doesn't have a good front line. Generally you want to go AP.
If you're getting deleted as AP Cho, you're playing him wrong. If you're going full AP, you need to pretend you're a ranged caster for 75% of the fight. You only go in to melee range to feast or clean up low health targets.
it would depend on what your team needs. if you're playing cho mid, you typically need to bring the AP for the team; if you're top lane, you should be a bit tankier. Either way, is a strong item; whether or not you go + probably depends on how fed you are if you're top lane.
