Game is stuttering

My game is really stuttering in last mission of campaign, it also happens on larger maps when lots of units are moved. After casting kenos and killing first inhibitor, frame rate dropped below 1 fps. I've had all my units rallied at that time and some heroes attacking my dungeon core.

Game was ran on low graphic settings on dedicated nvidia 750m card. It seemed like it was CPU problem though. My output_log.txt is full of thrown exceptions.

output_log

DxDiag.txt