Originally Posted by madindehead

Is that actually a nerf though?

Look at this:

On a character with 442 spirit and 2913 spell power (unbuffed).

Old version of Life Tap would convert 2816 health into 2816 mana.

New version of Life Tap will convert 2153 health into 2946.5 mana.

Assuming my maths is correct, you are now converting less health, into more mana than the old version of Life Tap. So really, it's a buff. Only just, but still a buff.

Then imagine what that would be with Fel Armor, and a flask on top of that. The amount of health that is taken will increase slower than the amount of mana that the warlock receives.

I'm not sure what the average warlock has in the way of spirit and spell power once buffed, but I can imagine those figures getting better as your gear level increases.

(Those figures are taken from a lock in my guild with 4pc T10, and mainly ICC 10 and 25 man loot to give a rough picture).