Trigon is a fire beast of tremendous power. Not even the Teen Titans can take him down with ease. Mephisto has powers of his own, but in the end I don’t think they’d be a match for Trigon’s. Trigon has fireballs. Trigon wins.
DReager1.com
The Ultimate Fighting/Review Site
DReager1.com 
Tough call, Tigon I guess
I agree with Trigon because I feel like he has more actual on the battlefield experience and has really had some great feats in the past