If I were you (guessing on your spending here):
Freedom
IHG
Us Airways
AA (60k offer? idn what the highest is atm)
Hilton amex (very low spend card)

Might want to consider also the citi hilton visa card is very churnable for 50k points atm. Realize Hilton was devalued but it is the most churnable card and mine as well jump on that while you still can. But you need to space out with AA app wise. read the wikis