Accidentally stumbled across an exploit during the Shelldiver boss fight. If you trigger the boss spawn but switch to a character near the pad for the crystal bot and tell the bot to return to the pad the boss will spawn but remain completely stationary and allow you to attack it freely without spawning any enemies from the spawners and will instantly die when the crystal bot starts to drill it.

Haven’t tried to reproduce the bug yet so can’t confirm if you can successfully pull it off consistently but thought it was worth a mention.