We're the same level, both 24.
I'll just have to keep trying new combinations of stuff and take what was said above. The main problem I come across is when he stuns me and then I can't take the agro off Kira, nor can I do any damage to him. Plus once Kira is taken out, he has about half to a little under half of his health and all he does is stun me (which lasts about 5-10 seconds, just enough to take away at least 1000 of my health) and shower me with lightning and while I'm still stunned, he uses his shockwave/pushback thing and now I'm laying on the ground 30 feet away and now he uses his uder force ranged attack and by this time, I'm pretty much dead.
It's just annoying, but eventually I'll find the right combination and win. Hopefully sooner than later.