It used to be limited to 3 per class, BvG or HvH, and we reduced it to 2 per class limit. In my opinion, this works well. We always take the first 10 PMs. If there are already 2 of so and so class, we move to the next PM. Making it 1 assassin or 1 cleric or 1 veno isn't really fair, in my opinion. :/ Besides that, we'd also have to limit it to 1 barb. I don't know, this doesn't seem like a good idea and I think other GMs will agree with me. Sorry. :/