What is the benifiet of the Arcanist?

John Q. Mayhem said:

Just wanted to say that EoM[R] multi-caster-class-chars work great. A PC in my siblings campaign has three different casting classes (mageknight/mage/taskmage), and is going to take another next level (longwalker), and then a casting PrC (mage-priest, from AU/E)

Click to expand...

Do I remember correctly, that you use even the rule "MP limit = HD + LA"?

RW, you had indicated that someone might be able to get a slight discount on the MP cost of a signature spell or magic item when it had limitations on it. For example, a Charm Humanoid spell that only affects elves.

Perhaps that would be another reason to become an arcanist? The spells in books are, by definition, signature spells so then they would be able to be cast with a slight discount.

For example, what if a signature spell got a -1 MP cost reduction if the spell is significantly limited. Then an Arcanist casting a spell out of a spell book would also get that cost reduction.

Just a thought.