This site, while not 100% accurate all the time is pretty spot on 98% of the time, lists all the archtypes, what they replace, so you can see which ones can be combined.
having looked at that matrix before, i'm pretty sure they're all mutually exclusive. the only one that you might be able to combine with something else is the gladiator archetype because it doesn't replace armor or weapon training at any level.
Well, a quick check says "very little." Almost all of the archetypes alter both Weapon and Armor Training. All I'm seeing is:
1)Dawnflower Dervish with Armor Master or Savage Warrior
2)Gladiator with too-many-to-list.