Lanius Boarders

[Raikaria]

How do I deal with these guys? Lanius Boarders are easily the best in the game, due to their lack of combat downsides, and O2 draining effect, causing them to win against Mantis/Rockmen due to suffocation damage, and you can't even vent them out because, yeah.

Crystals might beat them but Crystal crew are not exactly in abundance.

Every time Lanius crew board I either lose someone or multiple, or have to play a really long hit-and-run to the medbay [Because if they end up there Suffocation will out-damage the regen...] while they run riot in my ship and I can't repair the damage they deal and the ship kills me instead.

I mean, Fire Bombs work but they are neither common nor that useful unless you are boarding with Rocks. If you have Hacking you can send them back, but the teleporter cooldowns tend to be shorter than the Hacking cooldowns.

[Levgre]

Overwhelm and attack them fast. Upgrade oxygen if you reach a Lanius sector, and open up the room you are in to the rest of the ship, so you get some extra oxygen flow in the fighting room.