Metalline Claws(or is this one shot down, by "Soulmelds are made of Incarnum, not metal")?
On that Account:
Does Metalline work with the Cold Iron Claws you get from binding Ipos?
Needs 12 effective Levels of Binder, no room for full Kensai, unless you blow a Feat on Imp. Binding.
How about using Eurynome's Maul as your Kensai/ Legacy Weapon?
If possible:
If you could manage Kensai 10 + binder level 19th, would this get you an +3 anarchic adamantine warhammer with the +10 worth of enchantments from Kensai on top of it?
Realistically, I think it stops at BL 15th + Kensai 5(6 with Favored Vestige)
Ankheg Breastplate + some Armor Enchantments?
What else would make a good fit for Legacy Item?