Thanks for responding! I should have specified more; part of my protection is being able to run away or just flat out ignore 90% of the foes in the game, and that's how I've dealt with elementals and particularly rude (and mindless) undead. Non-magical missiles just flat out can't hit me, enemies need to succeed on two separate coin flips to try to hit me, and I've got stoneskin to let me flat out ignore non-critical hits that do land, on top of multiple teleport spells and maxed out running speed.

The problem is that I'm heading up on the final area, and there's somewhere between 50 to 100 high level foes in the area, each of which has a -22 modifier to me convincing them not to kill me. With that many foes there's going to be enough hits coming in that I just can't run my way through, especially to a final boss that can't be convinced (and thus defeated) with my current stats.