Most advantageous Corps to run missions are the ones that do something else than just standing or LP.

1)Any Corp that unlocks an Epic Arc.
Expert Distribution, Impetus, Brutor Tribe, Ministry of Internal Orderm etc
2)Any R&D Corp
Lai Dai, Duvolle, Creo-Don, Boundless Creations etc
3)Any Corp that offers lvl 5 missions
Ishukone Watch, Spacelane etc
4)Any Corp corresponding to a major trade hub
Caldary Navy, Fed Navy, Emperor, Brutor, etc
5)Any Corp with a good refining station.


Guristas - Kinetic / Thermal
Serpentis - Thermal / Kinetic
Blood Raider - Thermal / EM
Sansha's Nation - EM / Thermal
Angel Cartel - Kinetic / Explosive / Thermal

Cosmic Signature
Ladar(gas),
Magnetometric(analyse/salvage),
Gravimetric(mining),
Radar(hacking),
Unknown(rats/WH)

Minmatar - Ladar
Caldari - Gravimetric
Gallente - Magnetometric
Amarr - Radar