On the long run, this unkillable team.

But don't try that right now. Your account seems quite new, and I'm sure you can't touch the speed requirements for this team with your actual gear. For now, I would just use Deacon, Kael, Ronda, Doompriest, Klodd.

And some more general advise. Fisrt, stop investing in champs you don't need, like Tallia and Elhain. They are not bad in general, but they are magic affinity damage dealers, like Kael and Ronda. It doesn't help your progression to build several champs that fullfill the same role and have the same affinity. Then, stop investing in bad champs like Warpriest. And stop making new lvl 50 champs. Instead, bring some of the champs that are lvl 50 to 60, this will help your account progression much more.