Skill Discussions

Aside from the hopefully obvious ship [armor, shield, hull, capacitor, etc.] and refining skills [level 4 for compression]:

Capital Industrial 5
Warfare Link Specialist 5
Mining Director 5
Information Warfare 5 [10% targeting, very important with mining laser range link]
Armor Warfare 5 [10% more armor]
Siege Warfare 5 [10% more shield]
Skirmish Warfare 5 [optional, but any booster should have it]
Cybernetics 5 [for Mining Foreman Mindlink implant]
Fleet Command 5

Industrial Reconfiguration 4+
Cloning Facility Operation 4+
Graviton Physics 4+ [optional, as you'll never use a Capital Tractor beam]
Capital Shield Emission Systems 4+ [optional, as you'll never use a Capital Shield Transporter]
Survey 5 [optional, as you'll never use a Survey Scanner]

Jump Drive Calibration 5 [I wish this was a prerequisite for all jump capable ships]
Jump Fuel Conservation 4+
Cynosural Field Theory 4+ [always fit a cyno and carry LO3]

Anchoring 1+ [always carry a gallente control tower if you have Config Starbase role]

NOTE: Boosting was changed in Odyssey. Only mining boosting can be done within a forcefield. For the others, the Rorqual must be partially outside the forcefield (just enough so that the control tower is targetable).

For what it is worth: my Rorqual pilot. Drones are his only weapon system, so I made him into a Rattlesnake & Gila pilot for missions, a Dominix pilot for PvP, and a carrier pilot (which lead to a Logistics pilot). Jump Freighter was also a natural extension of the jump drive skills (heading to BLOPS next). Orca pilot too of course. Command ships are also a natural extension of fleet boosting. He can also mine when there is another booster.