Warlock · talent ability, from Siphon Life

Siphon Life

401per cast

Rank 4 · level 60 · before talents

Siphon Life

365 Mana30 yd range

Instant

Transfers 41 health from the target to the caster every 3 sec. Lasts 30 sec.

Talents that change it, each at full ranks:
 Improved Shadow Bolt · after a Shadow Bolt crit  +80.1 Master Demonologist · with your Imp or with your Succubus  +40.1 Demonic Knowledge · with a demon  +29.3 Malediction  +20.0 Shadow Mastery  +20.0 Suppression  +12.5 Malevolence  +9.8 Pandemic  +6.9

All 4 ranks

Rank	Level	Per cast	Per second
Rank 1	30	108	71.7
Rank 2	38	186	124
Rank 3	48	283	189
Rank 4	58	401	267

Plan a Warlock 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.