Who should be my first r3?

xakhll

I'm coming up on my first r3 six star, and I have quite a few champs that I could take up, and I can't seem to make the decision for myself, so I'd like you all to. I have a t5 tech catalyst and t5 mutant catalyst, plus I'm close to a cosmic one. I'm trying to make my push for thronebreaker, I just got cavalier about a month ago. Let me know who you think is best for the push to the grandmaster!