I created a test Magelo with BiS gear. It is a human since they start with 85 DEX and 85 CHA. This means it is easy to see what stat is higher after you apply gear. I put 12 points into DEX, 12 points into CHA, and 1 point into STR (just to avoid having DEX or CHA being higher).
https://wiki.project1999.com/Magelo_...rdVeliousBiS01
As I thought, CHA is the harder stat to cap with BiS gear, so I would dump into CHA during character creation. A Human's STA is 246 pre-buffed, so dumping into STA would end up being a waste. CHA is like 50 points behind DEX. At 172 CHA, you would still end up being under 200 CHA pre-buffed after dumping 25 points into it. Bards may switch to different instruments other than epic in certain situations, so stats will change a bit based on what instrument you are using. Even taking that into account, you aren't going to be in a situation where CHA becomes higher than DEX.
Obviously people in non-BiS gear will have more variation in what their stats are, but generally speaking the trend with Velious era gear for melee classes is a focus on melee stats (STR, STA, DEX, AGI), and less focus on WIS, INT, and CHA.