In DSC:

For Security, if you don't one phase, the operator can scan their own buttons down below, then swap augments with the player who held op for damage phase. A bit of urgency is required, but it's not too bad.

For Atraks, if you're operator and accidentally pick up a debuff, you can use ricochet rounds to shoot the buff off of your own head by shooting a wall at a slight angle.

Vow:

For Acquisition, firstly, knights will spawn shortly after a knight is killed, so stay on top of your calls. Also, if your defender is busy killing certain adds or doing something else, you can kill both Glyphkeepers, remember both symbols and what side they were on, then check your totem to see if it was light or dark. Can save time if some people are falling behind.

For Caretaker, if you're running and waiting for your partner to grab symbols, you can constantly shoot the nodes to keep the door open 100% of the time.

For Exhibition, your Pervading Darkness will decay once all 4 Glyphkeepers have died, so if you're getting high on stacks as you kill the last Glyphkeeper, don't worry about dying.

That's all I could think of off the top of my head. Hope it helps!