enhancing: protect v spamming on besieged generals works well until the level 80 cap, and with the mana drinks, MP potions, convert, you wont run out of MP. You very often get +0.5 and +0.4s.

Healing: find your favorite level 80+ undead, and cure spam it lol.
Guard and parry: train mandys in altepa, but those skills being useless, I never bothered.