Notable, but my Red Mage Technique of Twinkery shows that a rating 2 intelligence Troll is also much easier to raise with a Rating 10 Expendable (Increase Intelligence) Focus than somone with rating 6 intelligence, no?
All I have to do is throw 6 sorcery, 6 spell pool, and 10 focus dice against a target number of 2:
11 07 05 04 04 04 03 03 03 03 03 02 02 02 02 01 01 01 01 01 01 01 #D:22 TN:2 HR:11 S:15
Wow, 15 successes! So let's see here, that's an increase of 7 intelligence provided a Force 7 increase intelligence spell. On a mage with 6 intelligence, that roll would have only increased their INT by 1 point. So the troll ends up with 9 INT and the mage with 7, fancy that, eh?