Effects, Slowmo, After Fortuna Update

[Nacyus]

Title says in nutshell.
After Fortuna update im not only crashing on relays only(another topic i made)
But seems like the effects have a way bigger impact on performance than before the update.
For example whenever i shoot more than 5 enemies point blank with arca plasmor, my game goes in a kind of slow motion for a second..
When im in a team, certain warframe skills and gunshots that has a visually bigger effect also produce this slowmo for me when im close to them.
I updated my nvidia driver to the latest build if that could be the issue.
I didnt change any settings aside from turning off the film grain after the Fortuna update.
My game always been running at (capped) 75 fps nearly everywhere even in teams (eidolon dropped to 60 tho)
Fortuna(Vallis) is running in between 30-60 fps when im in a fight.
It is mostly the effects causing my game to drop alot in fps like a slowmo not like a stuttering.
My game settings are kinda lowish-mid on graphics, no particles or anything specially effects related turned on or higher than medium.

Edited November 10, 2018 by Nacyus
30-60 in vallis not fortuna. fortuna is ok.