Hypersmurf
Moderatarrrrh...
Ventriloquism has a verbal component. Therefor it would have to be a silenced version of the spell to be able to be cast from inside a sphere of silence.
My apologies - I meant the Ventriloquism is running before the Silence occurs.
Another precombat buff - Cat's Grace, Mage Armor, Ventriloquism, Haste, Shield.
This makes the person inside the sphere effectivly deaf. Therefor the verbal component cannot be cast from outside the sphere using ventriloquism.
Good point about the Deafness - but deafness isn't automatic failure for a (V) spell, it's a 20% arcane failure chance. Which I agree should be applied.
-Hyp.