By additional damage procs, you mean stuff like additional elemental effects or precision damage? Maybe the Elemental Barrage-type strats with 4 elemental enchants are back on the menu.
How about Spirited Charge?
Looks like it works too.
It doesn't work on 'normal' enchants since those add damage in the same roll, but some proc it as a separate source - in A1 you can buy the longspear Death from Above, it does it's 1d4 damage separately from the main blow, and then gets x3 mythic charge damage added on top. Similarly the Living Ram armor.
Both of these damage sources are conditional, so that's probably why they are sourced separately.
So on a charge attack you add (3x3xMR)d6 divine per attack.
Should also work with the x5 cavalier capstone and pounce.