Just a suggestion - try to get as much +stam/resilience gear you can get (honor + arena rewards) and enchant/socket them with healing and mp5 enchants/gems.
Stamina only costs 75% on items lvlstatwise in TBC (i.e. Items with "of the eagle"-suffix have 1.5 times more stamina than int). This does not include enchants and gems. That is why you will see a huge statincrease if you equip complete pvp gear and add healing/mp5 gems/enchants instead of socketing/enchanting a few pvp-items with stamina/resilience gems and equip pve-items on the other slots.
Stamina only costs 75% on items lvlstatwise in TBC (i.e. Items with "of the eagle"-suffix have 1.5 times more stamina than int). This does not include enchants and gems. That is why you will see a huge statincrease if you equip complete pvp gear and add healing/mp5 gems/enchants instead of socketing/enchanting a few pvp-items with stamina/resilience gems and equip pve-items on the other slots.