I think Long is a great NBL player, really came along once he got to know the system. Possibly the best big man in the latter part of the season.
But it would be a strange fit.
Unless they think Brandt can help out at PF, which I don't feel he can, you'd basically be pushing him out the door.
Gus is contracted, and on record that he and his wife want to call Perth home. (And yes, they even bought a house ;-))
You can't expect him to play 10 minutes off the bench as Long's backup.
Jervis is the perfect fit. He stood up when it counted, and he's going to be happy to play out his career, at home, on the bench, for lowish salary, and whatever minutes he gets.
And why spend money, an import slot, and opportunity cost, on something that is really a luxury.
I can't imagine La La strutting her stuff in Perth, but somebody LIKE Carmelo would be a good fit.
If (and its a huge if) they wanted to use all 3 import slots, then what we need is a pairing of a 2/3 (like White) and a 3/4.
One option is to retain White as the starter, and bring in a 3/4 to effectively replace Wagstaff as the 6th man.