Anyone know what is causing me lag spikes whenever i use abilities in pvp?

lag spikes most noticeable on wotlk for some reason, but im using weakauras 4. and the Tsoukie addons from https://gitlab.com/users/Tsoukie/projects but I have tried disabling addons one by one and still i experience it pretty much always and it randomly doesn't lag... what could be causing this??? its especially bad when i change forms on druid or press bubble on priest.

Cross post from here https://forum.warmane.com/showthread.php?t=473472