The rules state that you get to roll a power die for each web token (trying to roll a surge symbol), but can you use your fatigue tokens to get extra dice to try to escape? I had a hero caught up in a web and a couple of spiders kept their distance far enough to assure that the hero stayed in the web while other creatures repeatedly kill the lone weak Spiritspeaker Mok (I think was his name). The game was fun at first but that tactic (clever as it was) made that game session no fun at all. The death of the heros was inevitable.
Use Fatigue Tokens to Escape from Web?
You can't do this....although it's not a bad idea. The only two ways to add power dice are 1) Be playing Road to Legend and have Melee trait dice, and 2) Have a specific Magic Skill that adds +1 power die to all trap rolls (I think it's called Wild Talent?)