I'm currently using form dance TB as my main and I have been rotating between Frost nova, Fire nova, perma frost and fire aura. 
I am not sure which I should stick with; I have had usefulness out of both and have been hindered (So to speak by both of each.)

Things to note

Play style: I am an Aoe-er maniac and that is an understatment. (Which is one reason I loved using demigods like TB and QOT.)

I like to kite a lot, don't need healing if you aren't getting hurt right?

My main goal while playing is not getting kills, and not out damaging the guy next to me, but instead is map control. (There is a reason its called conquest XD)

I am a supportive player, as long as I don't become the meat shield in the conflict. That is why we have ub, rook, and oak players .

I am also an easy player to communicate in game with.

So whch of both skills would you thing would be more usefulto me?