Unstable Framerate Since 1.3.1.d

Full Edit to make it more clear :

Hello, i m experiencing unstable framerate since the last patch 1.3.1.d when using dominating blow.
The lag is not constant it slike i m having 15fps every 5 seconds when i dominate more then 10/20 mobs (usually run around 45fps with 40+mobs)

Before this patch i used to see a stable 45 Fps when having around 50 minions, when goin up to 200/300 minions it used to go lower like 15/20 FPS but still it was stable, and stayed around 15/20 fps.

At the moment i have regular jump every few seconds :
50fps/15fps/50fps/15fps etc...
If i lower graphic setting it goes like this :
100fps/15fps/100fps/15fps
I ll put a screenshot below so you can see more clearly what i am talking about.


I always start search for a problem on my side even if this happens straight after the patch 1.3.1.d :
I tried to desactivate desync and aliasing but the problem still remain
I have updtated graphic drive, clean the hard drive etc...
The framerate is still very unstable, here is a screenshot so you can see clearly what i am talking about, you will see that frames are jumping constantly :

Btw no problem at all with other games that are much more demanding on specs

Here is the screen :

Merge with upper post

bump

Bump,
Problem remains, i will still precise that this happens only on Path of exile, i ve played few other games that are much more demanding on specs with no problem at all.

Same problem...R.I.P PoE