It is very tough out there right now. citibank stock is 1.30. Personally I can see why you want a higher limit if you want the aa miles. Right now I think airmiles have less appeal to me due to devaluing and other issues.
With Citi you cant get a cl raise for at least 6 months. You want to reallocate. Give them a call and ask about reallocating part of your line from one card to another.
Rob