wut?

Enhanced resist buffs for any enhancing class that is only able to put up 2-5 buffs, with all 2-5 being used to actually kill the target faster, or to maintain better efficiency, will never, ever have a place. Specific to your example, Poison. The only time they've really had a deadly poison effect is when it's a high value and it's an aura. Other than that, Poisona. Silly to buff resistance in the face of out right removing the effect.