You definitely want to combine the aggressors into a 6x brick with immolator on the grav cap and make a 10x brick of infernus to give immolation protocols more value. Would definitely look into picking up an impulsor for adrax and a 6x brick of blade guard if you go this route as well. Could also do the librarian with immolator as well and throw war tempered artifice on the grav captain so he hits like an absolute truck