Engineering- Practical Engineering as in I see problem I make simplest fix to get job done -Stark...
Stupid engineering/pants on head engineering that's obscenely overcomplicated, probably goes to Reed or Doom.
Genetics- for near instantaneous results I'm split between High Evolutionary and Sinister. Long term genetics have to hand it to the celestials. The mutant species and everyone else they created.... none too shabby.
Advanced Robotics- I'd give Professor Ivo the nod here. Amazo >>> Ultron series IMO.
Psychology- Deadpool's therapist if he's alive... but seriously, most high level telepaths have a pretty good idea of what motivates people and what makes a noggin function.
Arcane arts- Conflicted here. Shazam/ barring that Probably Dr. Fate/Doom
Hacking- Hank Henshaw