Is there any real use for these anymore? The only thing that i can think of is for Sindrogasa, but not sure if there are any other fights that it would be useful.
Heres the frost prot potion.
Mighty Frost Protection Potion
3 sec cast
Reagents:
Crystallized Fire (2), Imbued Vial
Mighty Frost Protection Potion
Requires Level 70
Item Level 80
Use: Absorbs 4200 to 6000 Frost damage. Lasts 2 min. (1 Min Cooldown)
Sell Price: 50
http://www.wowhead.com/?spell=53937