Rolling 3 dices has 216 deffirent outcome.
You want any of the results that include a 3 (atleast I think the wind spell is number 3)
After going through some number crunching on a paper, i find that you have 55+36 outcome, which include atleast one 3.
(55+36)/216*100 = 42,13% (Yes there's a 3/6 = 50% chance of getting a 3 in a roll of the 3 dice, but a 42,13% chance of doing a roll of
1 or more 3´s.
Now, you also have the chance to roll a double, thus selecting the number 3.
Again, after slave-like number crunching:
(6*16)/216*100 = 44,44%
So.. Chances for rolling, either a double turning it into a 3, or rolling a 3, using 3 dices are:
44,44%+42,13% = 86,57%
Which is a pretty fair chance imo

- GW made it pretty damn easy to get the spells you want (You are practically sure of getting the spell you want with 4 dice (Being a lvl 4 wiz)
- Which actuallt leads me onto another point; Going for loremaster on a slann is going to be a waste, if you don't expect yourself to be using every single spell. (With life you are going to do so, so then it's all good) - But if you are going for say Metal, you only really want 3 spells for most cases, and in that case the +1 spell only costs 15 points, meaning you just saved yourself 35 point

.