I am rituall rank 10 and I have no Idea how to unlock stamina... The Orc is unbeatable as well as father. Everything else is locked because I don't have stamina or max destiny...
Stuck at lvl 26... from level 22 and upwards, money rewards don't keep up with increasing difficulty.
Here's a typical run for me: I start by dumping all my starting cash($428) in $/wave (= 36$) then dumping all the rest in $bonus (=7%), from there I try to keep damage and attack speed just enough to oneshot enemies and kill before I get damage. By wave I have $bonus=30% and $/wave=40 18. I need to upgrade damage twice to keep up with enemy hp... so I tend to start focusing on other offensive abilities like multishot and rapidfire... but it's not enough... by wave 26=27 I most surely die... I can't kill them fast enough and I don't have enough defensive capabilities...
Or maybe there is an OP build that I'm not seeing...