Like Bonbalon said, Sand Stream doesn't benefit your team that much. However, don't let this discourage you from using it. If it were me, I would drop the Tyranitarite off of Tyranitar, as he doesn't really need it. Also, why not consider using him as a lead? A good set is:
Tyranitar @ Focus Sash/Leftovers/Your Choice
Adamant/Hasty/Mild
252 HP, 252 Atk, 6 Spe
- Stealth Rock
- Crunch
- Stone Edge
- Earthquake
This set allows you to set up Stealth Rock, thanks to Focus Sash. Also it can still be used Mid-Game to hit REALLY hard thanks to it's Atk Investment. Honestly, a Special Attack Ttar isn't that great, especially when its Physical move pool is still really good.
Also, if you'd like to take Advantage of your Sand even more, perhaps you Mega could be Mawile, & you could replace Azumarill for it. A good set could be:
Mawile @ Mawilite
Adamant
252 HP, 252 Atk, 6 SpDef
- Swords Dance
- Sucker Punch
- Iron Head
- Play Rough
This set causes you to deal HUGE damage, and if you can get a swords dance off, or even 2, goodbye to anything that doesn't resist it.
This team is a doubles team. Each Pokemon there plays differently than in singles, such as Talonflame's use of Quick Guard and the widespread use of Protect and spread moves like Rock Slide.
Tyranitar should use:
-Rock Slide
-Crunch/Fire Blast
-Low Kick
-Protect
Nature: Adamant/Brave
EVs: 252 HP/220 Atk/36 Spe
Item: Chople Berry
Ability: Sand Stream
or
-Rock Slide
-Crunch
-Superpower/Low Kick
-Fire Blast/Ice Beam
Nature: Naive
EVs: 76 Atk/180 SAtk/252 Spe
Item: Choice Scarf
Ability: Sand Stream
or
-Rock Slide
-Crunch/Fire Blast
-Low Kick/Superpower
-Protect
Nature: Jolly/Naive
EVs: 4 HP/252 Atk/252 Spe
Item: Focus Sash
Ability: Sand Stream
In doubles, the fast pace there doesn't give Mawile enough time to set up Swords Dance:
-Play Rough
-Iron Head
-Sucker Punch
-Protect
Nature: Brave/Adamant
EVs: 252 HP/180 Atk/40 Def/36 SDef
Item: Mawilite
Ability: Intimidate/Hyper Cutter