Mage · talent ability, from Pyroblast

Pyroblast

775per cast

Rank 8 · level 60 · before talents

Pyroblast

440 Mana35 yd range

6 sec cast

Hurls an immense fiery boulder that causes 547 to 674 Fire damage and an additional 212 Fire damage over 12 sec.

Talents that change it, each at full ranks:
 Arcane Power · with Arcane Power active  +232 Shatter · against Frozen targets  +191 Improved Scorch · estimate: 5 Fire Vulnerability stacks  +116 Fire Power  +77.5 Arcane Instability  +35.0 Elemental Precision  +24.2 Critical Mass  +22.9 Ignite  +13.8 Arcane Mind  +0.8 Presence of Mind · with Presence of Mind active per second +387 Arcane Concentration per 100 mana +19.6 Master of Elements per 100 mana +1.6

All 8 ranks

Rank	Level	Per cast	Per second
Rank 1	20	151	25.1
Rank 2	24	186	30.9
Rank 3	30	260	43.4
Rank 4	36	336	56.1
Rank 5	42	424	70.7
Rank 6	48	532	88.7
Rank 7	54	648	108
Rank 8	60	775	129

Plan a Mage build

Averages, counting crits and misses, with a typical weapon and no other gear or buffs, against a target your level. Talents at level 60. Worked out from the game's own data, the same way as the Foresight addon.