I'm very aware of that!
Trying to balance MP is the main thing I'm doing right now for the time after DoL. At the same time I think I made SP maybe just a tiny little bit too hard.
My current plan is to make different hitpoint formulas for both.
Right now I'm writing a program, that replays all submitted MP games and evaluates the possible damage output of every round (by making the creeps temporarily immortal). I hope I'll be able to compare those graphs to the current hitpoint calculations and fit a better formula for MP.
Also, I'm planning to allow MP games with up to three players and for that I will change the amount of creeps for MP. Cause that's probably another reason for MP being easier. If there would be just one boss / one challenge no matter how many players, it will be much harder to defeat them.
Thanks for reporting, and I'm very happy about your feedback / suggestions.
No, thank you for your brilliant game. Just wish I wasnt so bad at it compared with the time I have invested in it xD