Here are the important caps for a warrior:
Damage Increase(from items): 100%
Hit Chance Increase: 45%
Defense Chance Increase: 45%
Lower Mana Cost: 40%
Hit Point Increase: 25
All Stats: 150 hard cap (You can have as much +gear as u want, but can't get over 150)
Faster Casting(Chivalry): 4
Faster Casting Recovery: 6
There are no caps on stamina increase, mana increase, or mana regeneration.
I am not positive on hit point regen or stamina regen... but I think they are around 24.
Mana Regeneration is on a diminshing returns system, meaning the more you have, the less each point helps. Also, your MR items will work better depending on your meditation, focus, and intelligence. A good number to shoot for, due to diminshing returns, is 8.
You can overcap your HCI to counter HLA(-25).
You can overcap DCI to counter HLD(-25) or Divine Fury(-20).
Hope this helps.