Rate my sandstorm pokemon team for competitive battling....?

FINALLY A COMPETITIVE TEAM I ACTUALLY CAN RATE

Just saying that if you need help on actual synergy go on the Smogon RMT forums, you'll tend to get better feedback there despite the formatting requirements. I'm just here to fix the actual Pokemon.

Okay firstly Tyranitar. Yeah Edgequake makes for great coverage but the reason Superpower is preferred is because Earthquake is a very bad move to be locked into, as while it is true you get the -1 from Superpower, Earthquake gives Levitators and Flying-types a completely free turn, plus Superpower has arguably better coverage and is more powerful. Fire Punch is also completely useless coverage, especially due to how prominent Rain is. As such, I'd say you should have Pursuit is better so you can trap Ghosts and Psychics. I also personally like to shift a few HP EVs into Speed so you can screw over Pokemon who happen to have a similar speed stat as you.

I personally prefer Stealth Rock over Spikes on Skarmory due to how Stealth Rock can hit everything but other than that he's fine.

Reuniclus is also fine

Scizor is just weird though. An all-out attacker Scizor isn't a bad idea per se but his bulk allows him to be much better as a Choice Band pivot or a Swords Dance sweeper. Seeing as your team lacks a powerful sweeper, I say you should turn Scizor into a Swords Dance sweeper. Replace Pursuit with Swords Dance since there's no point in doing that. From there you have two options. If you wish for more offensive prowess, you could change the EVs to the regular old 4 Def / 252 Atk / 252 Spd. If you want bulk, change the Life Orb to leftovers and replace Superpower with Roost. Or you could do neither and keep it like that to make setup of Swords Dance easier while maintaining some nice offensive power.

Choice Specs Rotom-W really really really really really loves Volt Switch. It scouts your opponent's actions and deals hefty damage while doing so, it really is awesome, so replace WoW with that in my opinion.

Gliscor is fine.

These changes should make the Pokemon themselves function better but again, I'm not an expert at OU so if you need synergy help go on Smogon and find one. Regardless I hoped I at least helped a little.

youve got a very good team..try having heal beller synchronize mucharna in place of reuniculus cause ur team can be prone to status ailments and pranksters.. instead u may try handing over a lum berry 2 one or 2 pokemon or add a FACADE to one of the pokes..or add substitue 2 gliscor instead of a weak ice fang....also rotom may be substituted wid bolt beaming latios with choice specs/expert belt to beat ur weaknesses....overall a well balanced team u hv got

Well balanced team.