Explanation of the formula:
base number * 2 = stat cap increased amount
base number * 3 = stat increased amount
base number + 10 = length of buff duration
base numbers of the potions
03 - I
06 - II
09 - III
12 - IV
15 - V
18 - VI
21 - VII
24 - VIII
27 - IX
30 - X
33 - XI
36 - XII
39 - XIII
Stacks with shaman spells (and their lines)
spirit of might
preternatural foresight
infusion of spirit
dire focusing
With this in mind you can use the potions for a short time to increase your stats even higher. Good for that particular raid mob that you can use the extra stats for.