Kharn, Flame Track

I completed wave 9 with a gaggle of g1 flamers. I now have a D1 Re'vas, Vindicta and Wrask... Will those 3 at D1 get me to wave 11 or 12? Or do you guys think I need another D1 flamer?

(Pushing flame because it's the most feasible way for me to get 400/400. Just need 360 pts. Which can be done in 3 flame tracks)