I don't know for sure, but I started to think that pets can cause boss resistances to increase in Therakiel's Temple as well as increase add count and their damage. No evidence, but maybe a dev could check this.
I could be missing a mechanic or imagining things though.
What happened was that our team kept failing at Baron and we felt like there were more adds than usual. We had 2 players in the team using the Teleiosaurus Pheromones device in the team, and on a whim, I said that maybe pets were making more adds spawn. We then both turned off the Teleiosaurus device and proceeded to complete the fight without a problem and as well found it to be much easier and faster.
I also just kept noticing how Vlad fight would be a lot more difficult when I participated in the fight compared to other runs and I usually have that Teleiosaurus device on while most others don't. The difficulty in that fight though could be explained by how the bats get heal ticks per target they are damaging thus causing them to live longer and more likely dispel a buff etc.
Soooo idk!
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