maybe an add:
also the best is to make this type of fleets tottaly simple..
well if you have mothership ha'tak fleets, you can attack or defend with fleet..
if you defeat a fleet in attacking / raiding or defending urself, you get 5-10% of the hatak fleet strength bonus to ground troops.
except for the mothership itself, that can give 100% from the volleys / shields, that they do already
would be also cool that you need to give about 250 untrained units for each Ha'tak or so... (+ about 75 mio naquadah for each ha'tak, cause they will be powerful too

)