Played ac nm randomed demo went Fortitude tree. No lags until I have leveled Spiked Armor. After i died lags stopped. I had leveled Spike armor lvl 1, IYF lvl 3 and Look! lvl 1 or 2. Lags were continuous. Didnt matter if I used IYF and Look! or not. If this is true maybe if u make Spike armor causing Ailment 5/10/20 dmg per second and 1 second lasting like CE chemical plating it would help(CE Chemical plating seems not causing lags and Ailment is applied to attackers like its at Spike armor, but im not sure if Chemical plating Ailment is applied only if enemies make hit to health or to dmg to shields aswell).