Mage n00b Question

[IzHaN80]

It is true that if i don't deal at least 50% damage, my pet will be eating 50%xp?
Also its true that if you do 0 dmg, but all via pet, the pet eats 75%xp??

In both cases, i find it very unfair to the mage class, to deal 50%dmg i gonna use about 40-45% of my mana in every pull.

Thanks in advance!