I can't get past the first level on Two Worlds 2 Castle Defense (http://store.steampowered.com/app/7530/ or http://www.twoworlds2.com/cd/about-en.html - DEMO), I die in 9th round or so and I have tried already many different combinations with no success at all...
By first level, you mean the Oswaroth's battle right? Here is my final combination:
I already passed that level. Good luck!