OK, we have a wizard with conviction, discipline and lore of 5. We choose spirit for our example. Evocation specialisation goes to spirit power, thaumaturgy specialisation goes to focus crafting.
7 refinements go to spirit control 5, spirit power 4, fire control 3, fire power 2, air control 1 (includes initial specialisation)
8 refinements go to 1 staff offensive spirit control +6, 1 mantle offensive spirit power +6 and 2 bracers for defensive spirit control/power +4 (includes starting items)
For -22 refresh, which isn't terribly high for High Council, we have:
Offensive Spirit Control: 16 shifts
Offensive Spirit Power: 15 shifts
Defensive Spirit Control: 14 shifts
Defensive Spirit Power: 13 shifts
So for someone like Ebenezar which uses both items and is a powerful evoker, 16-shift offense minimum, dealing 25+ stress with a single hit on most opponents or 19 stress on three zones at once or, for killing 200 mooks at once, 11 stress on seven zones at once, assuming said victims roll a fantastic for defense and Ebenezar doesn't roll very well.