It's really guards and bigs vs wings.
For miracle, I feel like Pierce/Ariza is a fine tandem in the NBA, but the talent is a bit more concentrated in this imaginary format and Pierce is really more useful as a 4 who doesn't have to guard anyone and can stretch the floor.The problem is miracle already has too many bigs as it is (seriously, nice depth) so Pierce has to play the 3.
Your best two players are Curry and Horford, but to put your best lineup on the floor, you have to play them out of position. I'd roll with Rose, Curry, Ariza, Horford, Duncan, which is nice, if the pieces can fit that way. Really highlights the challenge of this thing, which was to get as much talent as possible but also make it fit together as a roster. The way your team is put together, you really need Love in a shooting role, which negates his value as we saw in Cleveland this year.
Gossie, I feel like Durant/Wiggins is a stellar combo on the wing, but the crux of your team is the roles played by ZBo and Allen. With both of them only having a couple years left, plus Parker at PG, the future, which should be bright with Wiggins/Towns, could be left short handed. Your guys won't be at their peak at the same time.
I don't like Exum/Gordon to be more than athletes that don't really fit a position, but the length and youth are nice. Towns, of course, will be an All-Star, but I think it takes him 3-4 years like it does everyone besides the absolute freaks of nature. I do like Asik as a sturdy defender and rebounder, but he doesn't protect the rim much and next to Z-bo you're not going to get much shot blocking. If you can find a balance of those guys at the 5 spot, you should have a nice shot to contend until Z-Bo is done.
For the purposes of this, we have to assume Durant comes back fine, so he's one of the league's best players, but it definitely would be interesting to see him without a dynamic point like Westbrook. Jackson is your best bet at point, but he's really an undersized combo like Rodney Stuckey was. I'm not sure you can win with a guy like that, especially next to guys like Wiggins and Durant, but I'd roll with that lineup by default just because Exum isn't ready and Parker is near the end.
Meeks and Lance are good off the bench, and anytime you can have a guy with Lance's talent in a role where he isn't relied on to be a consistent contributor, that's a bonus. In fact, let me have five beers and I'd start telling you to start him at PG. Just saying, might work.
Think I'm voting Gossie, just because with two rosters that have flaws, I think his is at least ready to contend right now while Parker, Randolph and Allen are around.