RPM at high power levels

[Refplace]

Originally Posted by mlangsdorf

If you have IQ30, the only path skill you want is Thaumatology-100 [288], since all your Path skills default to Thaumatology -6. With the -5 penalty for fast casting, you can generate an average of 78 energy each second, in addition to the 300 point mana reserve from Ritual Path Magery 100.

They default to Thaumatology and are capped to 12 +Magery.
And there is another limit, from p. 6 of the RPM book

Every Path defaults to Thaumatology-6. Thus, someone
who has at least one point in Thaumatology can cast spells!
However, a defaulted Path skill cannot exceed 12, regardless of
how high the caster’s Thaumatology skill or Magery level is.