Hi! I'm brand new to... parts of toribash. I got up to intermediate in twinswords, but now that i want to try playing in the other gamemodes, I can't seem to sever limbs with any of my punches or kicks. Any advice for putting some real power in my attacks? (Please don't post an elaborate move that i couldn't actually pull off in multiplayer).

helpful hint reaxed joints move fast

That wasn't very helpful in my opinion.

It's hard to give general tips because of the almost infinite different situations you can be in. They might apply in 70% of the cases but aren't helpful in the other 30%.
The key to put power in your moves is to use your whole body. Most beginners kick by extending their knee and punch by contracting a pec but quite often it is important what you do with your shoulders, chest, abs and your other leg. Only by using your whole body you can speed your moves up and tear your opponents apart.

If you post a replay of you struggling I probably could give you more direct tips.