Works for me. Khaine will ask around if the slaves, especially any ithorian, can give us directions to access tunnels or even just generic directions to the tower that could bypass the guards.
Oh, can I modify a grenade with a 5 minute timer? Here's my idea. We bring along a refugee with payment of food and we all move in a group as far as we can. Then we have the refugee go off in the direction away from where we are heading and plant the grenade under a speeder or something that will go boom. Then we split up to get as close as we can in 5 minutes. After the distraction goes off we should have a small window to sneak in.
Ultimately, I think we need to make the zygerrians think that the shield is failing so they flee or we capture the port to get as many slaves away as we can.
Side note, if anyone knows how to make embedded videos smaller I would love to know your secret.