Unwinding Clock / Lux Cannon tap abuse

The deck is supposed to proliferate for poision counters, +1+1's from overseer to turn your 1/1 mana creatures into swingers, everflowing chalice, tumble magnet, and of course counters on the all powerfull Lux Cannon. If done right, you should be able to get 3 counters on Lux or 1 'destroy anything' per turn.
Unwinding clock keeps your myrs untapped to block/tap for counterspells, aswell as boosting Lux and Overseer. Suggestions muchly appreciated :)

Lands
8 [ZEN] Island (1)
4 [WWK] Tectonic Edge
4 [SOM] Seachrome Coast
2 [ZEN] Plains (4)

Creatures
3 [M11] Steel Overseer
4 [MBS] Plague Myr
4 [SOM] Silver Myr
Spells
3 [SOM] Mox Opal
4 [NPH] Unwinding Clock
3 [SOM] Lux Cannon
3 [M11] Voltaic Key
4 [ZEN] Into the Roil
2 [WWK] Everflowing Chalice
2 [SOM] Contagion Clasp
3 [SOM] Tumble Magnet
4 [NPH] Mental Misstep
3 [NPH] Tezzeret's Gambit

Sideboard
SB: 4 [SOM] Stoic Rebuttal
SB: 4 [NPH] Apostle's Blessing