Warlock · Destruction · tier 3 · from level 20

Ruin

+53.2 Hellfire

5/5 · level 60 · per cast · and 8 more

Ruin 12345

Rank 5/5

Increases the critical strike damage bonus of your Destruction spells by 100%.

Hellfire +1.7% +53.2 Rain of Fire +1.7% +14.9 Soul Fire +1.7% +7.4 Immolate +1.7% +7.3 Conflagrate +1.7% +4.8 Shadowburn +1.7% +4.6 Shadow Bolt +1.7% +4.5 Incinerate +1.7% +3.7 Searing Pain +1.7% +2.0

Averages, counting crits and misses, for a level 60 Warlock 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.