So first do this:
Then place down an overlay that is player scoped and make it inactive on start, wire the relay to the overlay: Relay Trigger > Show overlay Then it should work for only one player/team.
And make it so whenever they push the button they can build, you can also do this for buttons, zones, and anything else that can be no active on start and can be activate by the relay. Then wire the relay to a counter and a knock out manager, make the counter be player scoped and wire the Ko manager to the counter. Make a trigger that checks to see what the counter/the property that the counter is tracking is equal too, it then broadcasts on different channels depending on the number to different damage boosts. (you could also use chekers)
(That is just a theory tell me if it work, I won’t be online tomorrow or the rest of today.)