MINING YIELD:
Maxing it is going to require the following skills at V:

V - Exhumers
V - Astrogeology
V - Mining
V - Mining Barge

Also:
Mining Upgrades to IV (for 2x Mining Laser Upgrade II in your lows)

And the following implants:
Slot 7: Michi's Excavation augmentor (+5% mining yield) Donations Accepted!
Slot 10: (If you can spare the slot) Highwall (+5% mining yield)

Plus...
Mining Drones, Drone Navigation, Drone Interfacing... with T2 Mining Drones.
and... Medium Drone Mining Augmentor II (to max it)

BOOSTING:
1x Mining Foreman Mindlink
V - Mining Director
V - Warfare Link Specialist
V - Industrial Command Ships
1x Mining Foreman Link - Laser Optimization II
1x Mining Foreman Link - Mining Laser Field Enhacement II