'Fire ships', most likely - vessels used to ram Imperial ships. That or boarding craft. Would be nice if there was a Gallofree or two in First Strike's depiction of the Battle of Endor, if there is one made, used for that purpose. Bring it close to an Imperial ship, activate the explosives she carries, and evacuate her before she blows. Would be a nifty feature.

[O.T.]

Turns out it's mostly drilling equipment. Got to move fast to secure them oil wells after 'liberating' the moon. Tough luck no one realized that without Imperial rule, the various religious sects of the Sanctuary would turn on each others... crack Ewok suicide squad, grab your axes !
[/O.T.]

those ships do actualy have Blaster turrets on them

bout the same damage as the falcon

not many tho one on top and one on the bottom..... and any blaster the rebels can get they will take

plus the fact that they carry a mobile base

The more ships you have the more dangerous you appear and enemy fire is more dispersed meaning less damage to more important ships. Its like historical battles, the army's had elite troops and the idiot's with no training. Elite troops do the fighting, weak troops are used as a target, or just to tip the balance.