Dusty is about as close to risk free as you get given he's in 67% of teams, so the only reason to bet against him is if you need a point of difference for rankings etc. If that's the case, I wouldn't go Greene as all he needs to do is miss a game or 2 and you're well and truly behind the 67% with Dusty whereas if Dusty misses a game you're in the same boat as 2/3 teams.
Don't hate the idea of betting against Dusty (especially as if it's someone who's had their bye you get +1 game in the comparison) but would ideally suggest someone with a little more durability, and who doesn't rely on goals as much for their scoring.
Langford around the same price could be worth a look? Or if you're keen on a more speculative, high risk/high reward option you could maybe look at Jezza?