Exploit for PTR realms to stack stats of items, more info here.
Code:
/run local a,b,n,l,p=20,68,"Primal Mooncloth Bag",GetInventoryItemLink,"player"if l(p,a)and l(p,b)and not IsInventoryItemLocked(a)then if n==GetItemInfo(l(p,b))then p=b;b=a;a=p;end PickupBagFromSlot(a)EquipCursorItem(b)end
I'm keeping the description short so you can use this fast before it's patched.
The first number (20) is your bag inventory slot. The second number (68) is your bank bag inventory slot. Change as necessary to match the bags you want to swap. Possible values at WowWiki. The values 20 and 68 are the rightmost bag and the leftmost bank bag.
The third value ("Primal Mooncloth Bag") is the name of the bag you want to flip back and forth. Be sure your bags aren't both named the same. If you don't do this right, your stats may go up and down each try instead of up every try.
Note: If your stats are going down rather than up, try the name of the other bag.