Well, I've heard a while ago that soon around the next patch, blizzard will be making "Gear ratings" (Im guessing its the item level that you see on all the database sites, I an example on the bottom of post.) But if this is so, maybe you could go get mid 60 instance gear and have it equipped as you queue up and enter. Then once you get in, put your real gear on, then eat drink cast heals for the 1 min prep time?
Maybe this will work till the next patch, dunno, maybe a PTR test?
Heres the example of Item level btw. (part in yellow)
Devastation
Tempest Keep
UniqueTwo-HandAxe
496 - 744 Damage
Speed 3.90(159.0 damage per second)
+75 Stamina
Durability 145 / 145
Requires Level 70
Equip: Improves critical strike rating by 50 (2.3%).
Equip: Increases attack power by 150.
Chance on hit: Increases your movement speed by 50%, and your melee attack speed by 20% for 30 sec.
Item Level 175
Source: Drop
Use: Reagent
Score: 1058