Pielorinho said:
Hmm -- here's a way you could achieve almost exactly the same effect. Instead of having the wizard give up proficiency with weapons, impose a -4 penalty when using any weapon, in exchange for a +3 bonus when using spells.
That could work, I think you nailed on the head. Like you pointed out, it achieves the effect I was looking for, while at the same time resolving any issues with multiclass, so I'll change the feats to read:
Precision Spell Targetting
You are adept at delivering touch spells, ranged touch and ranged spells to their targets
Prerequisite: Special! The only way to acquire this feat is to impose a voluntary restriction on the weapons your wizard or sorceror may use.
Effect: By limiting your weapon arsenal to only Daggers, Darts and Quarterstaves, and imposing a -4 penalty when using any other weapons, regardless of selections from any other classes, you gain a bonus of +3 on all checks and hit rolls required to 'aim' a touch or ranged touch spell.
In addition, it is more difficult for your targets to dodge your area of effect and simlar spells, resulting in a +3 modifier to the DC of any reflex save imposed by a spell you cast.
Although it is a bit sneaky, You may use the Exotic Weapon feat to buy back the use of any weapon you abandon to gain this feat.
Normal: You may use the weapons normally allowed to your class, and gain no added bonuses to your spellcasting effectiveness.
AND
Pinpoint Spell Targetting
In exchange for abandoning martial weapons pratice, you have gained an excellent talent for delivering your touch, ranged touch and ranged spells to their targets.
Prerequisite: As with Precision Spell Targetting, this feat may only be gained by sacrificing your proficiency in weapons normally allowed to your class. A wizard or sorceror selecting this feat is subject to a -4 penalty when using any weapon, regardless of selections from other classes, having devoted her practice to learning how to better target her spells.
Effect: As with the Precision Spell Targetting feat, except that the bonus to checks and DCs for the caster's spells increases to +6.
I chose to leave the "buy back" clause for
Exotic Weapon in there. First off, it requires burning a valuable feat to regain proficiency in just one weapon, when you gave up all your weapons to get the spell bonuses. Second, it is forseeable that a player may have second thoughts down the road about their choice, especially if they come into possession of some cool magic weapon, so I think its acceptable to leave a back door clause in to allow them some leeway later on.