Yeah judgement is kinda similar you need more attack to do damage.
My recommendation is Dropping Muken for Valkarie in void for now(no need to inherit or get rid of him just change the partner in form), Valk gives a defence halos and his skill also Multiplies with the defense given by the halo giving a bit more survivability atleast. Focus more on HVI and try to get him to upwards of 1.5 mill attack which would need work but could be done pair that with ichimonji and hell verse buff you should do some solid damage if they ever lower void speed atleast hope that the added def from valk will give you the turn to actually hit thanks to aid and halo.
P.S:Muken is not bad its just more efficient to work on 1 assaulter and support at a time for maximum efficiency early on and then move to others when the main ones are suitably buffed.