With DCSS? Well... how much damage you do is going to depend on whether or not you're wearing a shield (what size?), what kind of armor you're wearing if any, how much you've trained for that weapon class, how much STR you have, what bonuses it has, and what bonuses you have from gear. Then RNG will play a significant role on top of that. Maybe RNG applies twice, once for your swing, once for their defense? It's been too long, I can't say confidently.
I realize it's challenging for the interface design because everything is already tight but I'm sure there's a solution. If I equip this armor/weapon/jewelry, how fast will I be attacking compared to now? What will my damage distribution look like before enemy resistances? Same with allocating stats, please give feedback in the form of derived data that is closer to the thing I care about (surviving).