I am in a little dilemma for my Evil Powergaming party.I will SK Edwin to a Sorcerer but i don`t know what to do:
a)leave his Amulet(extra spells)
b)SK his Amulet and give him Amulet Of Power(full spellcasting power)


I will probably leave his Amulet as it is but anyway just to make sure...

Surly you are suffering on a high level here. ;) In my opinion reduced spell
casting time is better than more spell on higher levels since you always have the
PI+Wish spell combo. And sorcerer have a *lot* of spell slots, anyway.
I would keep the amulet for the first couple of levels and then switch once you have reached, say level 20.

since it's a powergaming party the choice should be obvious.
the extra spell slots aren't that important anyway and you can always go for it with the HLAs

Nah !

Keep the Amulet of Power for your frontliner for protection from drain attacks.
And faster spell casting in the middle of the fight, you don't want to be interrupted.

You'll wear the Vecna anyway.

id say amulet of power. you really don't need the extra spells since you usually don't use up all of your spells.

No, get him the Amulet of Power