title says all, instead of 1v1 staking how about fighting it out 5v5 10v10 etc. Would be a great addition to pking and the staking scene I think the community reception would be more than positive.
You can already do that, but I guess it's not intuitive enough.
1. Form a party with your teammates. 2. Get opponent to form a party with same amount of players. 3. Right click their party leader, should show 'Team Challenge' option.