have a modidifier key to clear your focus. this will stop the succy from seducing the last mob.
/clearfocus [mod:alt]
i think is the code.

another thing would also be to leave the DPS to the warlocks and not the pets. i know you want most utility out of the succy, but 3 locks can handle dps just fine. no need for /petattack in my opinion.

another thing is... how are you tanking with the bear? what is your strategy when it comes to initiating a battle with (mana tombs?) three etherials? there's usually one caster and at least a melee or two per pull, if i remember mana tombs right.