Blood siblings heal too much off of my minions

I've just beat the Zelina and Zolin fight in the Act III interlude for the first time.

I'm doing a Contagion + Essence Drain & minions build, and my damage is somewhat low right now. The fight was basically impossible until I turned off my minions.

Something Zelina does is healing her for *huge* chunks of health (like 20%), and that healing was increasing off of my minions, I think. Turning them off made the healing way way lower. Having to disable my minions to make the fight feasible to do feels really bad.

I'm new to the game this season so I assume my build is way under-optimized compared to what a lot of people have at this stage. Happy to provide more build details if that's relevant.

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For reference, minions I was using: 1x Summon Infernal Hound, 2x Skeletal Warrior, 2x Skeletal Cleric, occasional Soul Offering, and Dark Effigy totem.

She has Life Leech and will heal off your minions