I think Forwards are the most important players after your 1, 7, and 9.
Problem is premium 1/7/9s rarely hit the market, so if you can't get one of them you just invest in forwards because a good pack makes your spine's job easier.
If there was someway getting rid of Haas would get us RTS, Cook, Grant, Munster, API, Burton, etc, it's a no brainer but take a look at Redcliffe, the market for players is shit. There's no one worthwhile off contract so releasing him just means we'd be under the cap next year rather than finding a worthy replacement.