What do you think about a game mode like this:
-When player A attacks player B's 8 he rolls and if he wins, then he gets the spot with the number of units that would be left after rolling, but would also keep all the units in the attacking area.
Ex. A player attacks B player's 8 with a 8. The roll comes out as 31-18. A player then gets the area he attacked with 5 units and also keeps all the units in the area he attacked by.
-When you lose the roll all your attacking units die and the defender keeps all his units.