Mountain thane fury uses thunderclap both as a single target skill and to maintain whirlwind stacks to cleave. So the single-button assist works in both aoe and single target. It also casts ravager for you because why not? The only input the player needs to remember to do is to press an avatar/recklessness button whenever ravager is about to fire.

Any other specs where their aoe is basically the same as ST? Maybe SV hunter?