If we're speaking bugged builds I think I got some improvements. Still theoretical, the playthrough to do this is a bit of a slog(Gotta kill Spaw and the Meregon without camping). I'll update more once I do it.

Verified some things with Barbs, but have to go back and do it again with Ranger and Sorcerer to max it out. It's possible to do 1 scroll cast and 1 permanent Flame Blade, dual Ring of Fire, Gloves of Flint and Steel and have a party wearing 13 (2 custom MCs, 2 companions, Glut, Halsin, Sazza, 4 spore servants, 2 companion spore servants) Devilfoil masks for +12 STR, hitting the cap of 30.

Multiple Rings of Fire and Gloves of Flint and Steel are pretty mean. The gloves proc chance to cause burning on each ring's bonus damage(and seemingly on the subsequent burning damage). The rings proc once each on the burning the gloves inflict. I've gotten up to 7 rounds of burning on a glitched Mossy Myconid that wouldn't turn hostile, and that would autoheal to keep itself from dying. Keep in mind, a lot of the time it died on first swing just using Gale.

Apparently Wild Magic:Enchant Weapons +1d4 force damage is currently permanent. Testing will require a bunch of savescumming. I do not know if it can apply to Flame Blades yet(possibly not, cause they can't be dipped or poisoned, Broodmother's Revenge doesn't effect them). Foregoing the Sorc, it's possible to have 12 masks and dual permanent flame blades for all party members.

Anyone know if the Circlet of Fire is still somewhere? It's no longer in the chests in Shattered Sanctum, nor a reward for rescuing people from the burning building in Waukeen's Rest.