I wonder, is it any useful to use Sand Force or Sand Rush with a Tyranitar on the team? I'm currently running Jolly Mold Breaker, but I don't know if I'd be better served with any of the other two abilities. He's acting as a spinner, and with Sand Stream's nerf I'm not sure if I need to go to anything besides Mold Breaker.
Edit: Also, what seems to be a better item on Jolly Mold Breaker spinner Excadrill, Air Balloon or Scarf? Currently running it with a team of Ttar/Tyrantrum/Scizor/Gastrodon/Talonflame. It looks like a Sandstorm team but it seriously isn't, it just happened to work out that way lol.
It really depends on your playstyle. If you observe that Excadrill always tends to come in when Sandstorm is up (especially if T-Tar can afford to hold a Smooth Rock), it's definitely a good idea to try one of Excadrill's weather abilities. With that said, Excadrill is by no means a bulky Pokemon. Make sure you're not forcing yourself into switching in Excadrill, because it's not going to be able to stand up to as many attacks if you play it like that. Also, make sure you're not losing out on coverage by dropping Mold Breaker. Considering Rotom-W is so popular, make sure your team can handle not having an offensive answer to it.
Basically, Sand Rush, Sand Force, and Mold Breaker are all useful given the right circumstances. The team you use and playstyle you follow will dictate which ability is the most useful.
As for an item, I personally love Scarf, but that's just because Excadrill is usually my late-game sweeper and revenge killer. If you don't use it like that, then Air Balloon is an equally great item (especially since you can play around so many immunities).