编辑“危机”（章节）

==== 成功击退了普雷索林虫群 ====

Prethoryn Swarm entities are heavily armored, attack enemies with missiles and strike craft, along with some acid bursts. Swarmlings possess Corvette-level evasion.

Since all their weapons either ignore or cause major damage to shields, and work equally well against armor and hull, combat fleets should protect themselves with point defense, armor, and plating.  Use energy weapons that deal bonus damage against both armor and hull to attack. Arc Emitters work well too; if you build Arc Emitter battleships, Cloud Lighting is a good support weapon for them.

Empires which lack the means to directly counter the Scourge's fleets should immediately focus on containing its expansion instead. Keeping multiple small fleets of corvettes or destroyers to hunt down their civilian ships and stopping infestations is a viable strategy to limit the spread of the Scourge, as they will send otherwise engaged fleets to try and stop your efforts.

If an important planet falls to a Prethoryn invasion, it will take much longer for them to infest it compared to uninhabited planets, as purging takes much longer than infestation. Infested planets are immediately turned into barren planets once they take enough planet damage. Since the Swarm only can infest habitable worlds, it is possible to starve them by cornering them and launching surgical strikes toward their planets to render them uninhabitable, thus widening the berth between them and any infestable territory. The Prethoryn will pull any fleets from surrounding systems to defend their planets, so fleets targeting Prethoryn planets must be prepared to face multiple swarm fleets if those have not been dealt with already. AI Empires in particular will use such hit-and-run tactics against infested planets. 

Another feasible strategy is to get a Colossus into the area where the Crisis will spawn and breaking all of the planets to starve them, putting your best fleets near the edge of the invasion zone is also helpful, stationing them at the ending for any wormholes leading out of the invasion zone is a must. Additionally, deconstructing certain starbases along the galactic rim once the galaxy has been completely filled up allows you to control where the Swarm will spawn, although you will have to make sure the AI don't try and take those otherwise unclaimed systems.

Prethoryn "Star Brood" fleets are composed of at least one Queen, escorted by Warrior and Brood Mother battleship equivalents, with Spawnling corvettes making up the bulk of the fleet combat strength. A fleet equipped with long-range weapons can expect to destroy a number of Spawnlings before the Prethoryn units are able to return fire, at which point emergency FTL can be used to avoid casualties altogether. By repairing and repeating, this guerrilla tactic can wear down Prethoryn fleets until they are small enough to defeat in a full confrontation.

Salvage should not be forgotten as it unlocks their bio-weaponry, which is most useful against them. Their starbases are equally good sources of technology while being much easier targets.
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