Shaman · Elemental Combat · tier 7 · from level 40 · needs Lava Burst

Elemental Mastery

+21.5 Lava Burst

1/1 · level 60 · per second of casting · with Elemental Mastery active · and 1 more

Elemental Mastery

Rank 1/1

Gain mastery over Fire and Lightning, reducing the cast time of Lightning Bolt and Lava Burst by 0.5 sec, and removing the cooldown from Chain Lightning. Lasts 15 sec.

Lava Burst +21.5 Lightning Bolt +19.6

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