A word regarding your memorizing comment: You have only to do the check, if you don't know already all the spell lists involved. But this still means, that those memorizable spells are ones, you could use as signature spells yourself (unless you are using Arcane Mastery). This is only useful for Dispel Magic spells or if you need a spell castable as standard action and you don't have enough signature spells available. But I think, in most cases you can cast the spell from a book instead devoting the MP.
In the end, I believe, that your comment has still a good amount of validity, but I'll let RW decide, if memorizing is too hard.
As the inventor of this rule, I can say, that it is meant as a general rule, not as an additional feat. Although it does invalidate a bit the special abilities of both classes, the "MP limit = HD"-rule is primarily responsible to eliminate the weakness of multiclassed casters, which have levels in non-caster classes (or casters in classes, who give a reduced amount of caster levels compared to the Mage). This means, that a few rules have to be rewritten, but this a small price compared to the effectiveness and elegance of this rule.
A sidenote: Please don't use hard line breaks while you write posts - they look simply awful on a bigger screen. Thanks in advance.
In the end, I believe, that your comment has still a good amount of validity, but I'll let RW decide, if memorizing is too hard.
anondragon said:This is meant as a replacement for the feat that allows a caster to do this for one spell list?(sorry don't have the book with me right now) Or as a general revision to the rules on MP limit. The main problem with this is that it would invalidate a lot of the neat tricks of the 1/2 casters (godhand and longwalker) that make them able to cast higher MP spells.
As just a feat it looks very tempting to my spellcasters. An adjustment that each feat applies this rule to (1 + intellegence bonus) spell lists would make it look very nice.
As the inventor of this rule, I can say, that it is meant as a general rule, not as an additional feat. Although it does invalidate a bit the special abilities of both classes, the "MP limit = HD"-rule is primarily responsible to eliminate the weakness of multiclassed casters, which have levels in non-caster classes (or casters in classes, who give a reduced amount of caster levels compared to the Mage). This means, that a few rules have to be rewritten, but this a small price compared to the effectiveness and elegance of this rule.
A sidenote: Please don't use hard line breaks while you write posts - they look simply awful on a bigger screen. Thanks in advance.