I had a shaper 6/constructor 10/totemist 2/soul manifester 10 build (going into epic) that was quite powerful and flavorful. He was a victim of the illithids' experiments, and he made awesome use of the powers in the back of MoI along with Overchannel, a hands-bound Metapsionic Rod of Extend Power, an orange ioun stone, and slot-changed Arcanists' Gloves (from MIC). He could get ludicrous bonuses to his manifester level, which allowed him to bind his soulmelds much earlier than normal, and he could make level 8 constructs around level 10.
He made awesome use of moving while ethereal (meaning he was auto-silent, invisible, and could pass through anything not made of force), and multiple miss-chances, and could solo entire encounters without actually going more than a little nova.
Good times.