Always good to gather all the units you can... ug them at will, probably focus on the faction you selected first (obviously), the units are too similar to say one is rightfully better than another in all situations.
Buzzsaws are weak against groups like aces while the other two are great against group. But buzzsaw becomes more lethal as the survivor warlust activates
Well, seraphs are better against uniques, artimes it great against swarms (due to having splash damage +tech) and buzzsaw is something inbetween
Yes I suppose buzzsaw is better at killing manticores than the others becuase corpus units are weak to sustain damage type
Buzzsaws are weak against groups like aces while the other two are great against group. But buzzsaw becomes more lethal as the survivor warlust activates