Diverted Energy vs Tempest Barrier
From WowHead it says 1st is best:
While IcyVeins just simply says Tempest Barrier.Sounds better than it is. The percentage it heals is taken from the damage absorbed. This means that at 25% it can heal up to 5% of your max health. Only useful when in situations with consistent damage or limited healing. Even then, Tempest Barrier is likely a better option.
Checking top rio fire mages, I see most people going for Tempest Barrier so i'm quite divided.
I know it doesn't matter DPS wise, but I believe it do matter in raid situations due to healer pressure. Even though we mages have quite the absorb spells.
So, what's your professional opinion on the matter?