Quote from jking012;272213:
smash takes what? 12 stamina.... Hailstorm takes.. 175 mana?....
50-170mp with nothing
32-110mp with mana reduction, rank 1 ice mastery, 500int
29-98mp with rank 1 ice mastery, 999int, and mana reduction
Those numbers are due to the fact that hailstorm can be manually cancelled anytime before the full duration is up, but the 1st number in the set will always be the least mp used and the latter number will be the max. Also jking you must remember that the damage shown in the picture was from one fully charged hailstorm crystal, and that hailstorm can get...
15 one charge hits
11 two charge hits 
8 three charge hits 
7 four charge hits
6 five charge hits
at rank 1 hailstorm and even if only one or none of them it would still do devastating total damage for the mana mentioned above
[video=youtube;3qSmjQToTCY]http://www.youtube.com/watch?v=3qSmjQToTCY&feature=mfu_in_order&list=UL[/video]
The video above shows where i got my number of charge hits from.