In the past, i've pondered a Expert or Specialization talent for Wizards which would allow them to pay 1 less ST to cast (for example) Expert Summoner, Expert Creator, Expert Illusionist, Missile Specialist or Control Specialist.
Also, just as an athlete might do training for marathons and endurance tests of all sorts, I'd pictured a talent of Psychic Endurance. I think it'd look something like this:
PSYCHIC ENDURANCE(3) - When a wizard spends ST to pay the continuation cost of a spell, the PSYCHIC ENDURANCE skill allows them to power the spell for 2 turns instead of the normal one turn.
It goes to follow that if a Wizard could specialize in a particular type of spell and condition himself to be more equipped for the continued drain of ST for spells, he might also be able to learn how to recover more quickly:
MEDITATION(2) - When a Wizard with the MEDITATION talent rests specifically to regain ST lost to casting spells, they are able to recover double the normal amount of ST in the same amount of time. For every 15 minutes of rest, 2 ST points are recovered. MEDITATION can in no way recover ST lost from wounds.
EXPERT MEDITATION(3) - Prerequisite: the MEDITATION talent. When a Wizard with the EXPERT MEDITATION talent rests specifically to regain ST lost to casting spells, they are able to recover triple the normal amount of ST in the same amount of time. For every 15 minutes of rest, 3 ST points are recovered. This is NOT cumulative with the MEDITATION talent. EXPERT MEDITATION can in no way recover ST lost from wounds.