The Bondsman Squire equips as the household's only foot-soldier: a lightly-armed runner's kit of an autopistol and a band of frag and krak grenades, nothing heavier. The Squire has no war-engine, no field and no macro-weapon — it is barred from everything the titans carry, and arms only for its work running the objectives and troubling the enemy's lighter fighters while the lance grinds forward.
The Sacristan Engineer equips as a crewman, not a warrior. Its much-mended bionics are its own, worn into the flesh; beyond them it buys what it can carry — a servitor laspistol or autopistol for defence, the las-cutter torch that mends a hull and cuts armour in a pinch, and a band of frag, krak or melta charges for sabotage. A daring household may lash a salvaged heavy flamer to its backpack rig, and it may range a servo-skull ahead to mark targets. It carries no war-engine weapon and holds no relic; the Sacristan's arms are the tools of its trade, turned to fighting only when the enemy reaches the legs it works beneath.