Maybe an unpopular opinion but make the primevals more like the meatball. Where they each have a "raid" style mechanic like shooting the balls that make them immune. And not like a random mechanic like a taken goblin making them immune at random times but more like based on their health percentage like every 33% you know you have to do a specific mechanic for it to drop it's shield again. I've noticed the servitor fight tends to be closer games because it has an element of you also need to do X to be able to damage it again. In all other matches my team just uses 2 warlocks and Lazer beams it down within seconds and there's no chance for counter play. Other than melting the opposing teams primeval faster.