FrogReaver
The most respectful and polite poster ever
People make a lot more about bounded accuracy than they need to.
BA basically means that you baseline success around 66%. By and large. Which means that if you add bonuses to hit, all you are going to do is go from 66% to, say, 80%. Who cares? It doesn't matter.
Think about it this way. If your fighter types never had to roll a hit. They just automatically hit every single attack, do you really think it would make a huge difference to the game? Your fighters are always running second place in total damage behind the casters. They can't possibly be doing more. Not at any significant level anyway.
I always make the same suggestion here. Track the total damages your PC's are doing for the next 20 or 30 rounds of combat. Not individual damage - damage total. So a fireball that hits four targets for 25 points each is a 100 point attack. Your fighter types (including ranger and paladin) are so far behind that it's not even close. Things like feats and magic items bring the fighter types up to par with the casters.
But, make no mistake, your fighter types are not even remotely competing with the casters. Which is okay. They don't have to. Casters are artillery. Dealing lots of damage is what they're supposed to do. It's baked right into the game. But worrying about the non-casters damage output is pretty pointless when the casters are so far ahead.
Multi target damage for a fireball hitting 4 targets at 25 damage a piece is better estimated at 62.5 Damage. Multi target damage in most situations needs discounted to compare to single target damage (the whole reason we all agree focus fire is generally bettter).