See, I didn't know anything about the Krakstorm, probably because of my newness. Also, can any unit pilot a weapons platform? If so, that makes D-Cannons a lot more survivable. Honestly, I probably still wouldn't have called Ra going there, even if I knew these things. As for the Dragons, you don't have a transport and would probably not want them footslogging. I'd bet you have a unit for each emplacement. One for the Fortress and one for the Bastion and they pile out if a vehicle needs killing. Unless that is not allowed because Ra is already in the Fortress, in which case, they may use the fortress for cover or footslog.