Bards - CHA and DEX

[Erica]

I have about 158ish CHA and 120ish DEX. Not great, but this is my first and only character.

My understanding is CHA makes mez and lull resist less often, and charm not break early as often. But mez can never break early for bards I believe. I haven't noticed a huge difference with CHA while charming either (though it might be hard to notice since it is a 3 tick duration max anyway). I also haven't really had the chance to use lull much. Mostly just mez.

DEX just makes you miss notes less often, but you don't miss notes that often if you just keep your instrument skills up.

Is there a confirmed formula with how these two stats actually help? Do they really help enough to take them over STA or HP? Or even STR so I can carry more copper? :P