SWM wrote:[snip]
4) The ship coming through can only use grasers, but the defenders can fire missiles from outside graser range, from pods, ships, or fortresses. The defenders can also put graser mines inside graser range, ready to attack an enemy coming through the wormhole. The ship coming through has no sidewalls to protect it from the attack, and no impeller wedge to protect the vulnerable ventral and dorsal surfaces.
And while the defenders would usually use laserheads (which explode far enough away that the missile wedge doesn't hit and get destroyed by the grav 'lane' the transiting ship is stuck it) they also have a range advantage with energy weapons.
IIRC sidewalls roughly halve the effective range of lasers or grasers. And since the transiting ship can't raise sidewalls (no wedge) the defending ships could close to the point where their broadside energy mounts are effective but they're still far enough back that their sidewalls make them immune to return fire.
Opposed wormhole assaults are just ludicrously stacked against the attacker.