Random thought: set up your Gate of Babylon, then cast
brilliant aura. Aside from the obvious benefit, your sianghams (you
are using sianghams for their damage-to-weight ratio, right?
) do not treat you as providing cover even if they're also ghost touch. If you catch your opponents' weapons in the burst, laugh as they become unable to harm you.
You limn your allies in a glowing nimbus, transforming their attacks into brilliant energy. Each person affected by this aura gives off light as a torch (20 foot radius). Their weapon attacks (melee or ranged) function as if their weapons were brilliant energy weapons: they ignore nonliving matter, and armor and enhancement AC bonuses do not count against them. The attacks cannot harm undead, constructs, or objects. In addition, all attacks gain an enhancement bonus on damage equal to one-half the caster's level (maximum +10).
AFB - according to WotC index, the SpC version is an lv7/8 spell and works a little differently. A Ghost 2/Sorcerer+PrCs 18 could pull it off.
EDIT: Another random thought. Gestalt build with
Arcane Duelist on the other side. Brilliant aura + Flurry of swords + telekinesis. Don't forget to designate a
+2 force bastard sword as your Chosen Weapon and get some way to Dextrous Attack+Power Attack in a line (eg. Bloodstorm Blade +
lightning throw).
EDIT2:
Human SP Ghost 2/Arcane duelist 10/Sorcerer 8//Warblade 1/Sorcerer 10/Bloodstorm blade 3/Master of the unseen hand 5/Warblade +1
Feats: Power Attack
Spells: Brilliant auraCD