If by 'bright blue and gold' guys you mean Celestial Lions, which I just googled, then the whole Chapter is doomed by stupidity of painting the medic armor white, as ork snipers killed these guys first. Had the Apothecary been noncombatant, it wold make a bit of sense, but as of now, it just seems a way for enemy to effortlessly remove 1/1000 of IoM quick response force from circulation by killing a few guys