Penance Mark scaling bug

I believe penance mark is scaling unintendedly somehow related to bosses (e.g. inheriting resistances or scaling based off hp), making them incredibly difficult to kill during boss fights with no adds (seemingly the intended purpose to generate flask charges or proc on kill effects). The reason I think this is unintended is due to the description of the skill stating "The phantasms will be allies of the marked enemy with the same monster level". Specifically stating monster level instead of some sort of phrasing implying based off the monster itself.

Some examples of where I encountered this:
- Simulacrum (All mobs dead except boss. I initially thought it was due to deliriousness, but the white mobs where dying nearly instantly)
- Valdo Maps (both map boss and mods such as Elderslayers)

Some benchmarks I took in the Valdo map for the time to kill phantasms based off their marked target:
Baran the crusader - Phantasm spawns with ~80% hp (also why?) despawns with ~75% hp (with malevolence for extended duration on them)
Baran's flag spawn - Phantasm killed in 33 frames or ~0.5s
White rarity mob (Devourer) - Phantasm killed in 32 frames or ~0.5s

Tested on a T17 map boss and Phantasms also die as expected (~0.5s)

Edit: Added T17 benchmark.

Disregard this post, the valdo map I did I think had only can damage within 2m. Tried a different one today and it works fine. The simulacrum is likely due to just deliriousness.