EDIT: I think after looking, Agrivix is a good choice and there are plenty of good aether/fire devotions, items, skills, and augments to go fire/aether.
For a spellbinder, if I went with callidor’s tempest, devastation, siphon souls, reckless power and spectral for my main skills, would it make sense to convert everything to aether, esp since I’d use a myth mindwarp sword?
There are plenty of skills, items, set bonuses and devotions that boost both fire and aether or both vit and aether, so maybe I’d pick a pair and convert the third damage type to aether? Just in case something is resistant to aether, I’d have a second as a backup.
Or should I go all out aether? Seems a waste to convert vitality to aether when I have a vitality reduction to enemy resists and wear armor that boosts vit, but on the other hand I’d have skills and devotions that boost fire / aether that my vit damage would not benefit from.