1: Add a Curse weakness
2: Reduce all status penalties by 2/3rds
Why?
Mad Bomber offers the same strength buffs as Chaos with one less status penalty and is limited to 1/3rd the weapons. Give it Curse penalty and reduce all the status penalties on it to 1/3rd what it is now.
Since you only get 1/3rd the boost as Chaos you should only get 1/3rd the status penalty.
What about no curse weakness, but 1/2 all status penalties of the Chaos set instead of 1/3 of the penalties?
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Really, it's only slightly better than Chaos for pure bombers (no sword, no gun - only bombs) because it has no weakness to a rare status, but otherwise it's worse than Chaos in almost every way.
Well, I don't have any equips from either set, but from the stats shown on the wiki it seems to be this way.