Illusionary Vault Deck

Hi

In the last few days I was trying to develop a different variant of a Tezz/Vault/Key deck. And after reviwing my cards I decided to take shot with a card that I have always liked to play: Phyrexian Dreadnought
Basically the deck has the same contest as the other tezz based decks, with the adition of this big guy. I tested it a few times, and discovered that it can be quite awsome against some aggro stuff, and appears to have more options than the original tezz builds. Well, here is what I came with:

4 Dark Confidant
3 Phyrexian Dreadnought
1 Trinket Mage

1 Ancestral Recall
1 Brainstorm
4 Force of Will
3 Mana Drain
1 Misdirection
3 Stifle
1 Vampiric Tutor
1 Echoing Truth

3 Duress
1 Thoughtseize
1 Demonic Tutor
1 Imperial Seal
1 Time Walk
1 Merchant Scroll
1 Yawgmoth's Will

1 Lotus
5 Moxen
1 Sol Ring
1 Mana Crypt
1 Time Vault
1 Voltaic Key
1 Sensei's Top
2 Illusionary Mask

1 Tezzeret the Seeker

4 Underground Sea
4 Polluted Delta
1 Academy Ruins
1 Tolarian Academy
3 Islands
1 Flooded Strand

I opted for Bob to be the draw engine of the deck, since it is cheap to cast and can be played really fast and works in a deck that doesn't have some lands. I might give a try with TFKs but then I think I will have to add more lands. I also added the Imperial Seal, because I think this card is pretty awsome, and needs to be played in almost every combo variant. I am open to new ideas.

Thanks for reading,

-Leonardo Indini