Olivia bane question

Personally, -def is a definite no since she is melee, but I also like -hp because she has decent res to survive hits. It really doesn't matter; she's a dancer so she ain't battling nothing.

Definitely not Defense. Resistance means she'll do well enough against physical units but those mages will do a number. -HP will give her a little more edge for all around survivability, but it still isn't great. The best thing is, she shouldn't be seeing combat much unless you WANT her to. If so, Slaying Edge+ with refined Defense, Luna, and Swordbreaker will actually make her a great red and green killer, but you'll lose WoM.

-hp is the best. With her speed you shouldn't really get doubled, assuming you are running standard fury/refinement for speed, which means you want to keep her def/res intact. Also it is the only one which is a superbane of -4.