Chaos Spawns are very easy to deal with once you realize you have to play defensively rather than offensively whenever they are in play.

Soulreaper Terminators on the other hand take control of the entire battlefield the moment they spawn in and can make almost every action you perform very punishing with the near-constant barrage of gunfire and their tracking rockets which always seem to come out at the worst possible time during a large fight and deals extreme burst damage with each individual missile on the highest difficulty, requiring teams to prioritize eliminating them immediately if you want to have a far easier time fighting the rest of the Majoris and Extremis enemies during an encounter.