Suppose you have a telepath who wants to be able to soften up the resistance of targets with high willpower. The plan is to reduce the target's will score and then hit the target with Mind Probe or Mind Control.
This telepath might be interrogating stalwart warriors with IQ 9 and Will 16. To speak a language requires an IQ of 6. Thus the telepath does not want to reduce IQ very low. Ideally, the affliction should sap the target's Will without affecting IQ.
A possibility might be to use Affliction with Attribute Penalty. Presumably the cost for a penalty to Will would be the same as the cost for a penalty to IQ. I presume the Cumulative modifier would be necessary to make the effects stack.
Affliction (-1 to Will) level 1= 10 pts: Malediction/Ranged +190%, -1 attribute penalty +10%, Cumulative +400% Based on Will +20% =72 points
It would be much more expensive to use a version of Leech that saps Will instead of IQ. Presumably this would cost as much as a version of Leech that saps IQ.
Leech (drains Will) level 1 =25 pts: Malediction/Ranged +190%, Affects Will +300%, only heals FP -20%, Based on Will +20% = 148 points
Question: Is it reasonable to have an attack to Will cost the same as an attack to IQ?