What's a bit better than sleep or silence? Knockdown, Frozen, Charmed, Stunned. None are particularly expensive.

I went Gag Order 2 AP 4 Cooldown, 50% more magic armor damage, w/silence.

Chloro is 1 AP 3 Cooldown, base damage w/sleep.

Another way to go is 2 rounds of Silence for gag n puke.