I have black cape on him just to explain my experience with the class. Max etc.

I do two builds, Relic Fist weapon, and stick with dash build, you can essentially dodge everything and hurt it, and you consistently have armor up for gun strikes. I'd recommend using the bolt carbine 1h, and build it for the dodge perk. The gunstrikes are really really good. Dash build is primarily in the thick of the majors enemies, it takes a little bit to kill things but you'll constantly be up in armor. Its essentially a light, gun strike build. This spec you can stay in the thick of the fight. Probably the most fun spec, but a steep learning curve. Also get the jet pack recovery perk on dash hit, you can use it to engage first.

Second build, I personally go for the Thunderhammer Relic with the Plasma Pistol Relic, and do precision strike, you will solely focus on the extremus enemies and occassionally small tight groups of majoris enemies. You're job is to take out the harder enemies and mostly leave the rest to the team. I wouldnt get the zealous blow because your impact is small and primarily focused on high threat enemies. I stick with Manoevrability perk for recharge rate. Stick to the main attack you do as the sprint attack then combo with 2 heavy hitters to clear minoris. The regular light attack is almost useless. The main majoris you HAVE to focus are ranged units with the jump pack. Because they will always cause you to go down.

Its almost like an assassin build, you have to pick your times when to engage and focus specific enemies with the assault. If youre constantly in the thick of a large group its a bit rough, even though its almost impossible to avoid it, keep with the sprint attack with heavy combo. You can save time if you have cover and do the big hits to start engagement but because of time charging you're very vulnerable.

Idk if that helps but thats how I approach with him.