Warlock · Affliction · tier 2 · from level 15

Malediction

+85.1 Bane of Doom

5/5 · level 60 · per cast · and 7 more

Malediction 12345

Rank 5/5

Increases all periodic damage done by your Warlock spells by 5%.

Bane of Doom +5.0% +85.1 Bane of Agony +5.0% +27.0 Corruption +5.0% +21.4 Drain Soul +5.0% +20.5 Siphon Life +5.0% +20.0 Immolate +3.2% +13.4 Drain Life +5.0% +12.5 Wrack +5.0% +10.6

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.