Agree with Zeus. Wouldn't do potency sets but would do a potency cross. Naturally focus on Speed Arrow and speed secondaries. He has a pretty decent base crit rating but he also recovers 20% health on crit so more is better. I would prioritize crit chance up to 50% and then after that would focus on crit damage more. Considering he gains the crit damage synergy with Krennic against debuffed & rebel enemies DT should be able to hit pretty hard. Also nice to consider that his Terminate auto-crits on debuffed enemies. Seems like a healthy amount of crit damage will go a long ways to making him scary to face.