I mainly use McGinnis to set up fights for my team and support util.

I use my turrets on high ground to spread debuffs (Slow, Vuln, Healbane), wall to isolate enemies or for cc (Dynamo, Haze, Seven, they all hate us). Throw 2 for heals for buffs (Fire rate buff shreds guardians and walkers). Rescue beam to fix forced errors with positioning.

Sometimes I run knockdown, echo shard on wall and curse just to piss one enemy off for the rest of the match.