My recommendations:
Have Blazing Speed make the mage immune to snares/roots for at least 1-2 seconds... "Mage gains blazing speed! Crippling poison fades! rogue hits mage for 900 melee swing. Mage gains crippling poison!" Is just bullshit. Also have blazing speed leave a fire trail on the ground like in Diablo II. Anyone standing in it takes.....umm....9k DPS. Sounds good.
Put a 1 second silence, pacify, daze, stun, knockdown, disorient, SOMETHING on the end of living bomb. The pop-up effect was brilliant, not sure why that was removed.
Make scorch (but not pyro) ignore resilience. The spell is weak as hell anyway. This would give mages a way to reliably proc HS in PVP without affecting PVE.
Make molten armor hit harder. Like...really hard. Like for a thousand or more. Suck it, rogues.
76 pt talent... FIRE HYDRA. That's all Im saying.
*edit: final word: fire is not really viable at this time. It's very fun vs 0 resil targets but you just dont have reliable damage against real players. Oh, and you're the absolute easiest to kill spec in the game.