So what you are going to want to do is first make a macro, should look like ...
/script PickupInventoryItem(1PutItemInBackpack()
/script PickupInventoryItem(17) PutItemInBackpack()
/script PickupInventoryItem(16) PutItemInBackpack()
MAKE SURE YOUR BACKPACK HAS SPACE - THAT IS THE MAIN BAG
now make another macro to equip everything back
/equip Name of Weapon
/equip Name of Weapon
/equip Name of Weapon
Note: Replace 'Name of Weapon' with the actual name of weapon you are using, only need third if using a third weapon.
Now when you are about to be phased, you'll know this because he will be casting the spell "insanity", hit your first macro. And when the 4 clones spawn hit your second macro to re-equip.
You can also use any Outfitter type AddOn.
The order you want to kill things is Healer first, Highest Dps to lowest Dps, and then tank last. If a healer is casting a heal which they will use your War Stomp if you are a Tauren, or other cast interrupting spells, such as Fear, Psychic Scream, Shield Slam, Hammer of Wrath, etc. (Common Sense there)