Rage and Mana

[tschordi]

hi there
it may be a stupid question but: how do i increase Rage and Mana?

I play a mage and I am lvl 26. I've got 23 Rage, which means, I hardly can use Rage things because most petdragon abilities use 40 rage at least.
Same with Mana: i collected a lot of +Mana artifacts. Whithout them, i have like 50 Mana which is nor very much.

What am I doing wrong?