well the gretchin can be used to give orks a mobile coversave (poor man's
KFF).
and if gretchins get shot, that means less dead orks, too...
but anyway... give the gretchin a squighound to keep am in check. with a bit of luck those gretchin will adsorb two volleys of fire
oh and ditch the cybork body on the warboss a 6++ isnt worth 10 points. give him a relic instead. (da thinkin cap comes to mind)