Whilst sounding interesting Gisele's damage just is not there, even with chaotic or nightmare faction bonuses she is mediocre in a class full of greats and although she has a low cost, she still rarely seems worth it especially considering the reduced damage during her ult and without the base damage, bonus crit is not what you need. She may work for some things, but compared to a Wrath or even Gluttony, its a no from me.