I've seen a few of these types of decks lately, having designed one myself. I think dropping duskmantle seer for Master Biomancer is a better choice here. The synergy between undying and his coming into play effect is really powerful. Cloud Raptor would be good too, T1 Cloud Raptor T2 Young Wolf + Rapid Hybridization = 3/4 Flyer, 2/2 Wolf, 3/3 Frog (on turn 2 thats better then any aggro deck i've seen). I play Spell Rupture in my deck, but it seems too slow and moderately useful. The opponent has to tap out to use it effectively, and early on your own mana needs to be dedicated to ramping up. Relying on Spell Rupture means you don't have any board presence.
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You'll have to explain Daggerdrome Imp.... not sure I get that. I understand you to a point on Experiment One, but you lose me at a few of your choices; Slitherhead: Creatures that generate mana would be a better fit for this spot, arbor elves etc. You need faster ramp. Jarad's Order: No reanimate in your deck, why are you searching for a creature anyways? I don't get it. Mulch is better here (land or creatures). Treasured Find: Again... once its in your graveyard this spell doesn't help you cast it. Reanimator components would be better here, or perhaps one of the two green instants that put +1/+1 counters on the table? Not sure your primary combo is likely to survive long on the table, nor would you likely get that far against aggro/ramp.
Harbor Bandit from M13 is good too. Would sync up well with this deck design.
Use the Dimir Keyrune. Its a 3 cost artifact, that you can turn into an unblockable 2/2. The nice thing is the cipher will stay on the artifact even when it is not a creature. Nice for avoiding board wipes.