yes... for that school... so if you SF: enchantment... what about ALL the other schools?
is it gonna help me with nuking?
is it gonna help me with finger of death?
the benefit is situational while mana is universal.
and no, I don't have a problem with landing spells. The DC is 30 with a 34 cha, heighten and a +1 focus item. Not the best but close enough. The extra 5% chance to land a spell OF A CERTAIN SCHOOL does NOT make such a difference.