Well, after all that looking, thinking, and asking for input I have settled upon that awesomeness known as Spell Focus (Enchantment).
I'd been avoiding looking into the AEG Feat book though it is allowed and though I knew there was awesomeness contained therein.
But, in a desire to play my Beguiler as pure as possible in this campaign the Spirit Song feat in that book is likely my best choice.
Can't take it until 7th level but it will let my Mind Affecting spells affect Undead!!!!
(Thanks BK for allowing it)