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I'm also budgetizing right now. I have a Teachings deck featuring jace beleren , Urborg, Damnation, Coalition relic etc. and I'm not (yet) going to wreck it down in favor of this deck.

Sales prizes of a Dutch magic site - real price would be between 50-70% of these prices (prices in ⁈uro's):

venser, shaper savant - 9,00 each. Two-of maximum. It's a very important card if you intend to win without the combo, but definitely not budged. Budged option: riftwing cloudskate , which is already a 3/4-of.
body double - 1.75 each. Budget, staple, get 4.
reveillark - 3,50 each. Most expensive card of the deck if you play it full budget.
wrath of god - 13,00 each. Not budget, but not easily replacable either. I've got 2, how many have you got? As a competitive magic player, try and get 4 in the long term. Budget option condemn , temporal isolation , oblivion ring , other white 1-for-1's.
mirror entity - 5,50 each. If you use full bonded fetch and careful consideration , you can easily replace them with nantuko husk . However, it's not that expensive, and not having this seriously undermines your backup aggro plan.
epochrasite - 5,00 each. Not playing this hurts, but it isn't that important (except the nice synergy with the other staple rare, mirror entity ). Its best use is versus decks with mass removal, and you're not even worried about those decks (regarding the combo), post-wrath evoke rev and GG. Versus aggro aven riftwatcher is a fine replacement.
pithing needle - 17,50 each. Not budged at all, but playable in all formats, just like WoG try and get a playset over a longer period of time. Shuts down planeswalkers and manlands, and other problematic activated abilities (reinforce!). Replacable by oblivion ring vs planeswalkers, manland is still a big problem. Bounce them I guess, they come back tapped anyways.

Will post my list later, going to bed now.