I've read Elf Bane is unrealiable with the fire damage it proc's off of and what procs off of it can be buggy af., but that was in guild chat, so not a deffinate answer.
Somehow this is pretty symbolic of the game itself lol... Stuff that should work by all reasons and logic, but, for some odd reason, does not, and no one can get an answer on why, and the devs won't fix it either. That could describe a ton of things.
I've run elf bane and sun since almost launch when not all armor slots were even available for those 2 sets and I can tell you that devs have had to adjust almost everything that does work with elf bane specifically. It's always been hit or miss.
TBH set damage procs shouldnt be affected by anything imo, not even CP. More clear, a little more versatility, and easier to balance. And elf bane says 'abilities', a set proc isnt an ability; they should remove it affecting Zaan. I havent even been able to proc burning status from sunderflame, I might be wrong on that though.
I’ve been meaning to pair Zaan with Elf Bane, but I’m also not going to waste time farming or spending a fortune for a build that will be inevitably nerfed in the next major update.