Going to have to say sahagin. they're vulnerable to both sleep and lullaby, and while their water hate-reset is potent, it's not AOE like the anticans, does not cause short term petrification, and they cannot throat slash like the tonneberry's who just love to set you up for that one two kill.
Anticans, petri lasts 2 seconds, the Rng (EES) and War (Shoulder rush/we move w/ MS) have potential to do big dmg. Silence is an echo drop away from being cured. With the right pt setup you'd take minimal dmg and only have to watch out for hate reset, which is the same for Sahagins who do aoe crap and hate reset moves as well.