Warp gates and data centers are both destroyed by one shot with a mk I penetrator at 0.1, even after halving current firepower. If you half the current firepower of penetrators, a penetrator of equal MK can almost one shot a command shield post (the difference being the armor of the post!) at 0.1
That leaves AI eyes, command stations, and troop accelerators. Troop accelerators have no MK level, but by HP they rival core guard posts, so I suppose they are supposed to be tough. If you really wanted them taken out, you could change their armor.
