Sorry if this questions been done to death, but I didn't see it on here.
I just got the Coreset and it says that it supports 1-2 players, but that you can play with 3-4 players with a second coreset. As far as I can see, it seems that the only reason you would need a second coreset is because they only give you two threat trackers. Can anyone tell me if this is the case or if there are other factors involved (I haven't played yet, so I don't know if there are any game balance issues from limited cardstock).
Also, if I am right, is there an effective player limit, or can you run with as many people as you want? For example, is it possible to have two Tactics decks in the same game, or are there not enough cards/heroes to make that feasible?