Best A-bomb rule is by making OP as all hell. As-to make the other side just think ‘well i’ve lost, may as well not prolong it’.
-Rolls dice against all enemy units @ 5 or lower to kill
-Maximum damage to all facilities
-Hit any land territory you like
Another good idea it to make ALL technology incredibly powerful.
-Advanced artillery supports 3 Infantry, and 1 Tank
-Warbonds gives 3 dice worth of IPCs
-Long-range aircraft allow planes to land on islands as if they were part of the sea-zone, allows them a scramble range of 2, and for land battles
-Heavy bombers roll 3 dice and pick 2.
-Improved mech Infantry allow 1 Infantry that start in the same territory to move 2 spaces
-Rockets can destroy 1 land unit (owner chooses)