A Question about Fae’s IV’s.

Use the +Atk,-HP. HP Bane is the best for her hands down, cause she still has a boat load of it. Any boon is good with an HP Bane. In order from least useful to most, I think it would be Res since she has so much of it, Atk for some extra punch, Spd to prevent a few more doubles, and Def to make her an excellent mix tank(That’s the one I use. +Def,-HP)

Unless you occasionally run her with panic ploy the HP bane is probably you're best bet (nearly always).

I also agree to use the +Atk. For me, the -HP/+Atk is the obvious choice. You're giving up 3 Res, but the 30 res she has is really good. You're gaining +3 Attack and +3 Speed. That's an amazing trade off. Hp is almost always the best bane to have on any unit, except in niche cases.

I don't know how many more doubles you dodge with 30 compared to 27 speed, but that's going to affect how well you can use her bulk. The more speed you have, the less def/res due to taking fewer hits. If you're open to shuffling skills and seals around, I think it's slightly more efficient to run guard and QR on A.Tiki because you really won't dodge many doubles with 24 speed. If you let Fae's speed go up a bit, she can probably get away without guard (unless you're doing this just to deal with QP+moonbow Reinhardt? but she has the res to take him straight up with colour advantage) so she can use close/distant def.