RMT SandStorm

Here is full team info:

1) Tyranitar
-Stealth Rock
-Crunch
-Pursuit
-Superpower
Nature: Sassy
EVs: 252 HP/4 Atk/252 SDef
Item: Leftovers
Ability: Sand Stream

2) Gastrodon
~ Surf
~ Earth Power
~ Ice Beam
~ Recover
Item Attached: Life ord
Ability: Storm Drain
EVs and Nature:
EVs: 160 HP / 36 Def / 252 SpA / 60 SpD
Modest Nature

3) Forretress@Shed Shell
Ability: Sturdy
Careful Nature
252 HP / 4 Def / 252 SpD
~ Spikes
~ Rapid Spin
~ Toxic Spikes
~ Volt Switch

4) Jirachi
-Iron Head
-Thunder Wave
-Wish
-Fire Punch
Nature: Careful
EVs: 252 HP/224 Def/32 Spe
Item: Leftovers

5) Landorus @ Choice Scarf
Trait: Sand Force
EVs: 4 HP / 252 Atk / 252 Speed
Naive Nature (+Spe, -SpD)
- Earthquake
- U-turn
- Stone Edge
- Hidden Power [Ice]

6) Heatran
-Lava Plume
-Will-o-Wisp
-Protect
-Roar
Nature: Calm
EVs: 248 HP/252 SDef/8 Spe
Item: Air Balloon
Ability: Flash Fire

Let me know what you guys think.

Times have changed around Tyranitar, so if it wants to use a Stealth Rock set, it has to use this to make the most out of its great Special bulk:
-Stealth Rock
-Crunch
-Pursuit
-Fire Blast/Superpower/Stone Edge
Nature: Sassy/Careful
EVs: 252 HP/4 Atk/252 SDef
Item: Leftovers
Ability: Sand Stream

If Excadrill is used in a sandstorm team, it must always use Sand Rush. Mold Breaker doesn't cut it and is preferred outside of Sand teams. Also, Excadrill is an Uber, which means it doesn't see use in OU. Jirachi can help check Ice Pokemon alongside Heatran:
-Iron Head
-Body Slam/Thunder Wave
-Wish
-Fire Punch/Protect/Stealth Rock
Nature: Careful
EVs: 252 HP/224 Def/32 Spe
Item: Leftovers

or
-Iron Head
-Fire Punch
-Ice Punch
-Trick/U-turn/ThunderPunch
Nature: Jolly
EVs: 252 Atk/4 SAtk/252 Spe
Item: Choice Scarf

or
-Substitute
-Thunder Wave/Body Slam
-Iron Head
-Fire Punch
Nature: Jolly
EVs: 80 HP/252 Atk/176 Spe
Item: Leftovers

or
-Iron Head
-Fire Punch
-Thunderbolt
-Hidden Power (Ice)
Nature: Naive
EVs: 152 Atk/204 SAtk/152 Spe
Item: Expert Belt

Made the changes as you said. Thanks for the help.