I remember playing this game a bit back in 2021. I had beaten Legends on impossible a few times and enjoyed Crossworlds but could never beat it on impossible. I was playing a mage (lvl 51) and had around 20.4k leadership. I kept running into problems with (maybe) the last two bosses - "Z" and "K". In both cases the closest I could get would be to kill the boss only to have my depleted forces crushed by the remaining units they had summoned. Focusing on the units instead of the boss seemed to yield even worse results.

Anyone have better luck with a mage or even one of the other character classes on impossible? I didn't feel like a bunch of grinding just to get myself up a few more levels although I suspect that was probably the answer.