[spoon]

Originally posted by geoschmo:
Just set the fleet strat to capture planet and set the boarding ships strats to capture ships. You don't even have to worry about secondary strategies.

Thanks for running a test... Did you set Ships (no weapons) to break formations? I think that's what I meant by case (3) in the original post:

"3) as (1) above, but set ships (and Ships (no weapons)) to break formation: troop ship will head directly to the planet, instead of waiting until all WPs are destroyed"

This is probably the option I'll use - I'd rather accidentally glass the planet than lose ships, in this case...