Something to remember, especially with the new pop growth rules; Troop ships aren't just for invasions, that are also great for causing a forced planetary migration. I try to keep my troop ships cheap couse they are disposable, but I always have one with a capacity of 2500 troops and all the engines it can handle, I use that ship to transport ppl from my full planets to the low pop planets. just fill it, send it, the send it back for more carrying only 1
