Yup with Azii you have enough time to level up a lot before the champ enemies show up and then you're unstoppable :-p
I think that I leveled up 5times per minute (probably more because I don't think that it took me 10seconds) so I could theoretically get at least 200 lvl before a new wave. Or a lot more if I just put everything in Azii again just to be sure and extend that time pretty much forever, but even without that I would get so much Max HP increase from LVL ups and +600 heal if I just put everything in alchemy that the enemies couldn't possibly keep up.