Infinity Gem War

Which of the following could control and manipulate (to the highest capacity) the abilities given to them by the gems provided.

Villains:

Dr. Doom: Time Gem

Exodus: Mind Gem

Apocalypse: Power Gem

Ronan: Reality Gem

Magneto: Space Gem

Loki: Soul Gem

It doesn't matter which gem is most powerful, the question is who can tap into that power best, according to the gem they've been given?

They each get three hours to become familiar with said gem.

Loki or Doom.

I would give Exodus a good chance too.

However, I agree Doom and Loki would be the favorites with Doom outwitting Loki in the end.

Doom

Doom.

Doom

DOOM, damn! give him the gem of poo and he still find elaborate ways to beat the rest.