- two appropriate minor runes (str + hammer, div fav + prot, etc.)
- superior vigor (or even major or minor)
- 2x vitae runes
- 5x survivor insignia
- 15^50 weapons with +5AL or +30hp for attackers (zealous might be nice, too, or furious/sundering)
- -5/20% shields w/ +30 hp
- +5e^50 HSR 20% wands, or HCT 20% HSR 20% wands
- HSR 20% +30 hp foci
That might be enough to bridge the gap between henchies and heroes to put this issue to bed.
You wouldn't be able to control their skills, but they would be much more effective and have better survivability. I'd be willing to pay gold to an NPC for a one time character based upgrade. Pay 5k to an NPC in Kamadan to upgrade all that character's heroes to have this equipment in hard mode. And/or complete a Razah-like quest.