Abyssal mobs and minion build

As a witch minion build we have very very hard time to mapping because of the lag created by minions. Running Powered Zealots combined with Abyssal mobs creates huge amount of lag and FPS drops insanely while getting hard hits from mobs without having a chance to move, another contribuitor is the map itself narrow path or many other objects that obstruct movement.
Either rework zealots-vaal guards to be more powerful and faster with much more spirit cost rather then spawning 10 of them to blow screen with spells that FPS drops to 1-5.
The game is unplayable for me, I risk and lose maps because of this and because of insta shot from normal abyssal mobs skills which penetrates all rez and wipe ES+HP.
Now I really regret of playing witch when there are other classes that deals double the damage-faster skills-no lag-no risks.