There is no right answer there everybody will tell you their opinion only, just as I am going to do...
I have both and am traditionally a great lover of a revive toon (Aset) in my squad but have had recent success in PVP with
Sekhmet, cursing doom etc, removing gold buffs (Valor talisman)from all the toons showered in them from primordial talisman...
My choice Sekhmet hands down, Aset has a move that can take gold buffs off as well but for me her true best is her fury reviving and increasing health of her ally's....