AGGEMAM said:
But a Sor 10 / Wiz 10 could cast an incredible amount of spells having spell-engine capabilities of a sorceror and the the versatility of a wizard.
Any decent Sor 10 / Wiz 10 would have Int and Cha scores of at least 20, that would give this monster spellcaster:
- - Spells per day per level - -
0th - 1st - 2nd - 3rd - 4th - 5th
.10 - .14 - .12 - .11 - .10 - ...7
That is a whole lot of spells per day!!
In a party this could actually turn out to be the best type of spellcaster.
Lots of good would it make him. Especially given that if he concentrated on one ability score instead of two he would had far better save DC against his spells; and he would have 6th level spells and up. Some monsters (Rakshasa, for example) are immune to spells below level 6, IIRC. Plus there is Invincibility Globe, or whatever it's called, that do the same thing.
Beside, let' see:
Wizard 20, base spells per day:
0:4, 1:4, 2:4, 3:4, 4:4, 5:4, 6:4, 7:4, 8:4, 9:4
Total: 40, plus bonus spells for high Int.
Sorcerer 20, base spell per day:
0:6, 1:6, 2:6, 3:6, 4:6, 5:6, 6:6, 7:6, 8:6, 9:6
Total: 60, plus bonus spells for high Cha.
Wizard 10/Sorcerer 10
0:10, 1:10, 2:10, 3:9, 4:8, 5:7
Total: 54, plus bonus spells for high Cha and high Int.
Given that each 2 points in an ability scores means bonus spells, we can estimate that bonus spells for high ability score are about equal if spread out between two classes and two abilities, or if concentrated on only one.
Our dual-classed don't cast more spells than a sorcerer. He do cast some more than a wizard, though. He's happy. No comes the questions: "how many magic missiles is worth a meteor swarm ? How many phantasmal killer is worth a weird ? How many scare is worth a power word, kill ? How many charm person is worth a mass charm ?" And then there is also the problem of metamagic feats, whose cost is always in heightened spell slots, never in more numerous spell slots.
I stand by my affirmation that a multiclassed spellcaster is unbalanced in the weak side compared to a single classed spellcaster. This don't matter much if he's something like a wizard/rogue or fighter/cleric, but it does if he's a bard/cleric; or worse, a wizard/sorcerer (at least a arcane/divine combination allows to get spells he wouldn't be able to know otherwise, and to use most scrolls, staves and wands; whereas the wizard/sorcerer has the same magic item "limitations" as a pure wizard or sorc).
The thing to remember is that a 6th-level spell is more powerful than two 5th-level spells.