I am curious when most wizards take quicken. It seems on the surface a good feat because it basically allows you to cast 2 spells/rd. The downside is that you fill a high level spell slot with a quickened low level spell. When you start to be able to cast 6 or 7th level spells...are you really better off with a quickened 1st or 2nd level spell, or are you better off keeping your 6 and 7th level slots for the big guns.
So lets assume you like the tradeoff of sacrificing that high level slot for a quickened low level spell, when do you take quicken...12 level...15th level? Or are most wizards reducing the cost of quicken through metamagic school focus (complete mage)?...thereby taking it earlier?
I am just curious how most wizards approach quicken. I like a balanced mage who does a fair amount of battlefield control and is content to let the party dismantle the debuffed foe, but there are times when that powerful blaster spell is very effective.
There are many low level spells that are still efective when high level.
Yes, few peopr quicken without lowering slot adjustment. If your rich, you could buy a metamagic rod of quicken: then you can pick which spell is quicken on fly 3/day (of appropriate level).
Example, True strike is always useful if you think you can't afford to miss, but it takes a standard action to cast. Quicken means your next ranged touch or touch spell almost always hits (if you failed, unless you rolled low you had no chance).
Ray of enfeeblement never loses its power. SR is a issue (depending how much higher enemy is to you), but no save just an attack roll. Now you should target those who use melee likely, but even a wizard can be weakened if he wears too much gear (granted PCs are more likely to have lots if gear).
Maybe you want extra buffs: Displacement and Fly (if you didn't have it on before). Why both? Get out of melee reach.
If you just cast fly, you could get an attack of opportunity or be shot with an arrow.
Why displacement: almost like double the life (since miss you 1/2 the time).
Even battlefield control enjoys it: Evard's black tentacles on those foes and grease on these foes.
Why grease? So rogue can sneak attack them and so they fall down (likely). I don't need to explain Evard's tentacles.

That assumes 2 groups of enemies seperated, but you never know..