Amazing game, 5/5 for certain. Got all the achievements, finishing on day 44.. for anyone playing through don't worry about getting all the achievements before you win, it lets you play afterwards, so just focus on the three time-limited ones.
With the end boss, an apocalypse spell cast as soon as you see him goes a long way. It's tempting to cast it on the horde of 60 guys that appears before him, but save it.
Here was my combo if anyone is interested:
Shamans-Archers-Priests-Demon-Cursed Knights-Werewolves-Fighters-Skeletons -Goblins.
Use the suicide bombers when you're facing a bad matchup such as the blue guys vs werewolves, or madmen vs your cursed knights.
One thing that would have been nice, as a note for the developer - having to make 2 clicks to use abilities (once on the unit pic and then again on the ability) was very clunky UI design, ideally just having them all on-screen to click once to use them would have been better.Adding hotkeys for them as well would also have been great.