I think this specific list has bad mana. I think you should decide on a third color choice and go from there.
Also, Imperial recruiter sucks in this deck anyway. The toolbox factor is way to slow to really have a serious impact. Just play more trygon predators or gorilla shamns or what ever creature you really want to get anyway.
How bout Painter-Grindstone instead of Vault-Key? With some number of Trinket Mages in the deck you find all your pieces with Recruiter.
I was thinking about that, but really it's inferior unless you have Red Blasts or something to go with it.
Here is a list I ran from some time ago, it was fun. It isn't too relevant, but I thought it would be useful for you guys delving into this thought experiment. Here is the thread I was asked to post it in eons ago:
http://www.themanadrain.com/index.php?topic=38008.msg529685#msg5296851 tolarian academy
3 polluted delta
3 volcanic island
2 flooded strand
2 island
1 underground sea
1 badlands
1 swamp
5 moxen
mana crypt
mana vault
sol ring
black lotus
2 imperial recruiter
4 trinket mage
1 engineered explosives
1 sensei's divining top
4 mana drain
1 echoing truth
1 yawgmoth's will
1 mystical tutor
1 grindstone
ponder
brainstorm
ancestral recall
timewalk
4 force of will
vampiric tutor
1 pyroblast
2 red elemental blast
1 tormod's crypt
1 demonic tutor
4 accumulated knowledge
2 intuition
1 painter's servant
sb
1 darksteel colossus
1 platinum angel
1 tinker
3 extirpate
1 rack and ruin
3 leyline of the void
2 wasteland
1 stripmine
2 energy flux