If they are sent as a swarm you could bounce the laser off one to slow a second. This way you would not need to transport fuel. Also since you are aiming at sta

If they are sent as a swarm you could bounce the laser off one to slow a second. This way you would not need to transport fuel. Also since you are aiming at stars you could use a hub and spoke model which would speed up the takeover process since you could bypass the build stage for most stars.