Going first, then delaying to the the end of this round then going first again in next round doesn't make any sense and would seem op.
But... that's the current situation! (well, when the next round depends on initiative of course, but I notice it's usually my team)
And you can't really use 2 fireballs in a row... you know, cooldown and all

.
So far I've also found my 2 Melee characters always go before the mages, even if their initiative is the same (of course Initiative IS bugged here in the beta).