Massive FPS drops when spamming Dark Pact on skeletons

With 6 casts per second and 4 overlapping chains my FPS drop from 60 to around 40 (15 when camera is zoomed in). I've tried some other skills on the same char and none of them caused drops that massive (even skills which has been known for causing FPS drops like Icestorm or Firestorm).



- turning Dynamic Culling on and off has no effect.

- turning Global Illumination off and setting number of lights to low has no effect.

- turning off the sound in the config file has no effect.

- unequipping any MTX has no effect



- lowering the cast rate does have a positive effect on FPS.

- setting shadow quality to low does have a positive effect on FPS.

- summoning only 2 skeletons does have a positive effect on FPS.

- self-casting is not causing FPS drops.

- zooming camera in and out does have a huge effect on how big the FPS drops are.

- zooming camera in and casting Dark Pact on skeletons when they are out of field of view does help but still causes FPS drops to around 30-50 depending of how much of the skill visual is being displayed on a screen.



My specs:

GTX 1060 6GB
i7-4790
12GB RAM ddr3

I play on 1920x1080 res.

Just posting here to say I am seeing the same issue running at 2560x1440. I'm only in the campaign atm, I fear for my FPS in maps.

i7 6700k
gtx 1070
16GB ddr3