Sorry, missed the comment in overlapping posts....
According to the rules as written:
Utility spells require casting roll with a result roll exceeding 70 to be successfully cast.
Attack spells require the caster to roll once and compare to the RR column to obtain a target value that the target individual must exceed with their RR in order to resist the spell.
Elemental Attack Spells require the caster to roll once and it counts as both the casting and attacking roll.
It is easy to understand why there is confusion. I hope this clarifies it as it is how I play it (though I will ask Nicholas to confirm before calling it the official ruling)
* Every spell casting attempt requires a casting roll (regardless of the type of spell). They are always checked against the last column of the Maneuver Table. Therefore a Fumble or Fail is possible - as are Double, Double x2, or Triple results are also possible.
* If a Utility Spell is cast, then it acts as planned.
* If an Attack Spell is cast, then your roll also sets the resistance target for the defender to try to resist the spell.
* If an Elemental Attack Spell is cast, then your roll also acts as the attack roll to compare against the DB, dodge, etc. to avoid the impact of the spell that was cast.
(I will ask Nicholas to review this and correct or approve it)