Hey! Recently I figured that you are able to use Sinister Spores (LINK BELOW) on the bosses in Ashran. For example Kronus, Captains, Fangraal, and evne the last boss High Warlord Volrath For Alliance atleast!
Sinister Spores - Item - World of Warcraft
IMGUR Proof: https://i.imgur.com/ZpN3nOu.png
I don't think this is intended, and it's really usefull when you are fighting last boss, but the enemy team have alot of healers.
Hope you liked this ;-)