I'm stuck on Gregor the cockroach. I've reloaded and respec'ed for poison, speed, power... it doesn't matter. i cannot generate enough damage to negate his heal spell, and subversion only lasts for one turn instead of 2. Anyone have any ideas? I'm sorry if this has already been answered; a link to a guide would be immensely helpful.
OK so i still don't know why everyone likes withdrawl, but i beat the cockroach. Re-spec to max speed, and be sure to have full crystallize and Break. Break on first turn, crystallize on second. this allows break to recharge. when crystallize wears off, break again. it takes a while but it's worth it.
the withdrawl combo involves toxicant form, shadow blend, and withdrawl. when you get into the 20's then you can also use agile exposure to double the amount of damage by withdrawl.
Someone being "crystallized" is under the effects of a poison, according to the game. So withdrawl dispels it on hit. That's the reason it hits through it.