Ultimatum boss attack performance issues

During the Beastlord fight inside the ultimatum trial, his breath attacks cause significant performance spikes. The ultimatum itself usually runs at a stable 40-45fps for me during big fights around the Dias however the boss's breath attacks (especially the fire breath) drop the game down to 20-24fps.

There's multiple similar situations like this where certain encounters cause performance issues, such as the serpent queen fight in Act 2 in Keth.

Edit: I'm adding specs and images with the in-game graphics settings used.

No other demanding programs (no browser, no games etc.) are running on my computer while playing PoE2. The CPU I'm using is a Ryzen 5 1600, 24GB of RAM at 1067 Mhz (motherboard limitation) and my GPU is a GTX 1060 3GB.

The game runs up to 75-80fps (monitor refresh rate) when nothing intense is going on, and as stated about 40-45fps during fights, I only have issues with sparse performance hickups.







If i happen to play ultimatum soon again I will try to record the graph metrics as well during the attack.