it says "eats up 10% mana per tick", so in pvp it supossed to eat 4,5% mana per tick, right?

1) tested in duel, it eats only 2,3-2,5% per tick
(tested korruption slotted in different pets, lvl1/lvl76, common/heroic, results same)

2)also for some reason it eats less mana if enemy has %dmg reduce... (idk if its bug, put in past at lvl61 expansion %dmg reduce wasnt affecting korruption ability)