Personally I'd say 3v3 is as small as you want to go in a teamfight - if you lose one teammate a 2v3 is recoverable, but being in a 1v2 usually means guaranteed death. That's why you don't see high profile tournaments running 2v2 formats. That being said, you can always go to the MCG and ask around on there, I'm sure people would be willing to provide some support! You can find a link to it from the official Mordhau discord, under the competitive hub section!