This is my personal build i am currently running with this cray fun frame, you can go full umbral with this frame if you want but it's personally not worth the umbra forma to do so as this does more then enough damage vulnerability from reap which is 70 - 75% and gloom slowing enemies down by 45% with the added bonus of every skill having great range especially sow (30m) which is great for the melee focus of my build. You can swap out [Overextended] for adaptation if you wanna make him extra tanky if you wish but i found this set up to be more fun to play

I have a shadow claws/sevagoths shadow builds if you wanna check those out as they compliment each other very well and will do very good it most content and steel path if you play smart and carefully

I also have a guan dao prime and [Kronen Prime] builds i use for steel path when not using the shadow so i highly recommed checking those out too.