
Just do these two at the moment
With the current quadruple defense campaigns it's best to only save Karlia and Alaraph.
Karlia is a must because of the Polymer Saturated Atmosphere, which is the reason as to why the DSS is able to venture into the Gloom.
Alaraph because of the Voteless Processing Plant, which is the original reason why we're in the Void in the first place.
The other planets, Alairt III and Asperoth Prime, don't hold much of a significant effort to the war, but I'd be surprised if we're actually able to defend all of them.