What should I do?

[Glorishears]

There's no limit to how many wits you can stock up, but there's a limit to how many you can use. Wits aren't the only limited resource in the game -- board space (there's only so many hexes), position (there's only so many hexes from which a given unit can reach the front in one/two turns), and spawns (you can only make 1 or 2 new units per turn) are all limited.

So if you both sit there filling up the board, it's likely that whoever has more board space to use will win -- even if they take casualties on their rush, they should be able to come out ahead in units after all the trading.

I can imagine a few stalemates -- armies of bombshells will obviously sit out of range of each other, unable to rush because they can't attack the same turn that they move.

Two armies of scramblers facing each other raise the possibility of a chain reaction -- if one scrambler makes it to the other army it can take over the entire thing, given enough wits.