Our corp has more or less permanently settled into a C4 WH and I would like to know what we can do with our planets? Are only the habitable planets exploitable?
Risky business spending isk on planets in WH unless you know you have the support to defend them. I know a few WH corps that do, but realistically, most do not. It will be a time/isk expensive exercise so make sure you are up to the job first. See above link :)