Status is a good choice. Personally I would go full 27.5 for a slopeduro build. Marin Rift Zone is also an excellent choice and a really good deal. Mark Matthews built one up slopeduro style and it seems to run well for him. I've also seen the Trek Fuel Ex set up as a slopeduro which can technically also be run with 27.5 wheels although it is more expensive than your other options
I am thinking about building up a specialized status in size small (my normal size is medium) as a park/slopeduro bike. Thoughts?
I am in the middle of building a Status 140 into a slopeduro bike. I'm going to short-stroke the rear shock from 210x52.5 to 210x50 which should reduce the travel to about 133mm out back. I'm running a 140mm Pike with a Smashpot coil conversion. Drivetrain will be SRAM GX DH 1x7 and I'm going to start off running a rigid post.
I think the best choice for a slopeduro is buying a used small frame bike with 130-150 rear travel
As long as it's not too old. The reach on some of the older frames can be crazy short. I think modern short- and mid-travel frames are much more suited to the idea of slopeduro.
New drivetrain setup on my slopeduro Status. 3T 9-32 cassette, 12-speed chain and derailleur body, 11-speed GX DH cage, 11-speed pulleys. B-gap is big but it shifts nicely.