There’s a bunch of spells that i deemed useless while leveling as shadow, i stopped training smite after lv10, holy fire, only got one rank of cure disease and dispell, mind vision, soothe, shadow prot, only got 1 level of rez, mana burn and fade.
I think i only upgraded my personal defense spells like mind blast, mind flay, SW:P, shield, fort, renew and my heals.