Unholy thread necromancy!
So where do we stand now, that we have Covenants on hand? I'd suggest something like this:
40 Technique
+3 Puissant Technique
40 Form
+3 Puissant Form
+43 Focus
+9 Magic Theory
+2 Puissant Magic Theory
+1 Magic Theory specialty in spell design
+5 Intelligence
+3 Inventive Genius
+9 Aura
+5 Apprentice's Intelligence
+5 Apprentice's Magic Theory
+1 Magic Theory specialty in spell design
+3 Apprentice's Inventive Genius
+5 Familiar's Intelligence
+9 Familiar's Magic Theory
+1 Magic Theory specialty in spell design
+1 Superior Equipment (Free lab virtue)
+4 Greater Horde (Major lab virtue, +2 to General Quality and +2 to specialty)
+1 Highly Organized (Free lab virtue)
+3 Greater Feature (Major lab virtue)
+2 Greater Focus (Major lab flaw, -2 to General Quality and +4 to specialty)
198
The magus has Minor Magical Focus, Puissant Technique, Puissant Form, Puissant Magic Theory, and Inventive Genius. His apprentice has Inventive Genius. The magus used a suit of CrMe spells to grant himself, his apprentice, and his familiar Intelligence 5. His lab is at a magical aura of 9, and was built in a place accomodating a Greater Horde and improved a bit.
Of course, cooperation with other magi can increase his lab total. It would also be possible to imagine an even better laboratory.