Here are my thoughts on what could make victory conditions a bit better…
As said earlier, Axis must win one of two ways,
Either take 8 VCs on the Europe map and control at least 4 (more than half) on the pacific board, or…
Take 6 VCs on the pacific map and control at least 5 (more than half) on the europe board.
The Allies must win one of two ways,
Either take Berlin and Rome on the Europe map and limit the pacific Axis to no more than 3 (half of what they need) VCs, or…
Take Tokyo on the pacific map and limit the Europe Axis to no more than 4 (half of what they need) VCs.
So basically what this means is that to win you must completely rule one side and have the slight advantage on the other… Hope this helps!