One of my favorite ways to play the original StarCraft was in a "Team" game. In this game type, multiple players on the same "team" would share control, resources, supply, and even the same starting location. It was like playing as 1 player, only 2 humans were controlling it. It was a lot of fun.
I want to do something very similar in StarCraft 2, but I need to create a custom map in the Galaxy Editor to do it.
I found the editor can quite easily emulate this behavior. There is a Trigger action "Set Alliance for Player Group" to "...treat each other as Ally With Shared Vision, Control, And Spending." To use this, I create units for only 1 of the players, and then set all players to be allied with each other in this way. All the other players get no units and no resources. This makes it so 1 player is the actual owner of all the units and everyone else is tagging along with full control.
This nearly works! The problem is that if I am not the actual owning player, I can't actually see how many minerals/gas/supply the team has. This makes it pretty difficult to build stuff.
What would be the best way to display to the other players how many Minerals/Gas/Supply the team has?