Okay, yeah that's a good point about the way loot works and something I didn't really consider.

Maybe I'll just boost the WD as high as I can, then swap over and boost another WD to the same level, then play the 2 WD's as a separate team.

As far as keeping in sync, I actually find it quite easy with just 2 (as long as I keep movement speed the same) but can see that it would get a lot tougher with 4.
It's really easy with 2 to just turn off mouse broadcast and switch screens back and forth.

Thanks!