[spoon]

Originally posted by PvK:
1) Even in late-game, WP's can make the difference between a planet which can defend itself from a few ships, to one that will be completely wiped out by even a single minescule unite. This forces the enemy to use a fleet to destroy a planet, instead of being able to wipe out an entire system in one turn with a few units.

Mines do this, and they do it better.

2) Late-game WP's can destroy ships even in a large fleet, which can be helpful, but more importantly, if they cripple the mobility of an enemy ship, they can stop or slow an entire fleet, saving other worlds from destruction and buying time for the defender's fleet to arrive, and/or making it possible for the fleet to intercept the attacking fleet.

Good advice. I generally don't use WPs for anything except this and as Point Defense platforms. And if stopping ships is what you're after, don't bother with weapons that might accidentally destroy ships. Use Shield Depleters and Engine Destroyers.