Kurotowa said:
Not this again....
You see it does NOT remove the CL requirement. It removes a requirement higher than the spells involved. For example, the Invulnerability armor ability lists a standard CL18 because Wish and Miracle are the usual spells involved, but because it can also be created using Stoneskin it can be crafted at a lower CL if you use Stoneskin. The same rule goes for staffs and wonderous items - you always need a CL high enough to cast the spells being using in the crafting. There is no way for a Warlock to craft items using 9th level spells before 17th level.
Luckily, The Ur-Priest/Ex-Cleric (from complete divine - and if we can use complete arcane for the warlock we can use complete divine) can cast 9th level cleric spells with a caster level of 9 (or 10). Since the Warlock has a caster level of 12, the warlock can therefore make items requiring cleric spells of up to 9th level, assuming that the warlock makes the UMD check (not a guarantee, since divine spells have a higher DC).
There is nothing that says the Warlock is tied to the Cleric's caster level, rather than the Ur-Priest's, after all. Similarly, if there is any prestige class anywhere that grants access to 9th level wizard/sorceror spells at the 9th level of that prestige class the way an Ur-Priest gets access to 9th level spells at 9th level of that prestige class (and thus we can get access by some means to 9th level spells while having a caster level of 12th or less) than the Warlock can duplicate spells from the spell list of that prestige class, assuming that the warlock makes the UMD check.
[Edit] What do you know? The Sublime Chord almost fits the bill perfectly. Take a 5th level Wizard/1stlevel Bard/4th level Rogue/9th level sublime chord. IF the S.C. adds here prestige class levels to her Wizard levels for determining her caster level, then her caster level would be 14th (and 2 levels previously, would have been 12th). Thus she could cast 8th or lower arcane spells from the wizard/sorceror and bard lists at 12th caster level. Thus the Warlock could duplicate those spells with a 12th caster level. The Warlock would have to wait 2 levels to duplicate spells from the Sublime Chord spell list that are 9th level.
Or does he? If the Sublime Chord adds her caster levels to her Bard caster levels for some non-optimized reason, then her caster level for the 9th level spells will be less than 12, and thus all spells on her list would be duplicatable at 12th caster level by the Warlock. Sublime Chord is in Complete Arcane (where the Warlock is featured).
So there you have it. By duplicating spells from the Ur-Priest and Sublime Chord spell lists, the Warlock can in fact make items at 12th level that have those 9th level divine or arcane spells as prerequisites (for staffs, wondrous items, armor, shields and weapons but not for wands, potions or scrolls).