You all forgot the fact it highly affects the recast/cast time of the spells you cast on different arts .
The problem isn't in MP cost , but crowd control , main SCH is more effecient than RDM/SCH in crowd control .
Also Accession + Refresh is plain dumb & comes from people who are utterly lazy *** , you basically never save MP unless you're casting on 3 people NOT including yourself , since it *** up with composured Refresh .
Refresh II + Accession "that if it worked in the first place" just precipatate that fact , dumb & lazy.