Another new level 90 talent replacement idea.
Unending Frost
instant cast
Applies a debuff to the target that does X damage over 8s and slowing the target by x%. This ability will Jump to additional targets, reducing the damage by 5% for each additional jump. With each new jump the duration will reset, but those enemies that have already been affected will recieve a 60second debuff making them immune to further jumps. All effects reduced by 50% against enemy players.
This could be a fun and useful ability for both PvP and heavy AoE fights where mobs continue to replenish (i.e. Tortos with bats and turtles). But timing would have to be right to maximize the effects of the ability and getting it to carry over to multiple waves of mobs.
Burnout
Instant cast, no GCD
Applies a 3 stack debuff to the target lasting 10 seconds. For each stack the target takes an additional 15% critical bonus damage from the applying Mage. For each successive crit, a stack is removed.
i.e. Mage applies Burnout to target (3 stacks)
Mage hits target with fireball - Normal damage
Mage crits target with a fireball - 200% crit damage + an additional 45% (3 stacks x 15%). 1 stack is removed.
If there are not 3 crits in the 10 second period the debuff simply falls off.
Temporal Rift
Instant Cast, no GCD
Time has no meaning for the Mage. The next 3 attacks are all instant casts, costing no mana, and the GCD has been reduced to 0.25seconds. While this buff is active on the mage, the mage will do 50% damage to enemy players
All 3 abilities would be useful in their own unique ways to all 3 specs. Obviously Unending Frost would shine in AoE fights, but the other 2 could be used in Many Scenarios.
To compensate for the 15% damage loss from the current level 90 talents,
Frostbolt, frostfire bolt, fireball, pyroblast, arcane blast, arcane missiles, arcane barrage will all receive a 12% base damage boost, and all 3 specs will receive the old "execute" effect that Fire used to have.