1) JiTB Nests - Which can be countered by not face checking bushes
2) Shiv spam - One offensive ability that can actually be used with a horrendous cd, horrendous enough to make it barely spammable
3) Hallucinate suicide - Sending in your clone to blow up
AP Shaco has no place on any team unless you're obviously trolling and don't care about winning. At least AD Shaco can BD and add so much more to team fights.
2. there is no need to shiv spam.
3. There is zero need for that either.
The real way to play AP shaco: Q behind enemy, DFG active, use up sheen/lichbane proc, E. This usually get a enemy down to 80% or below hp(or kill it outright).