Turn 4 combo out.
Intention is to run out and protect a board state that includes a Mill/Ping win condition with:
1) Altar or Molten (at least 1)
2) Zero cost artifact (at least 1)
3) Golem or drone (at least 1)

Untap with (U) open so you can play and use the instant bounce spells on one of the creatures, tap and bounce the zero artifact, then replay it to mill/ping  - repeat until opponent is dead or no more cards in library. 
protect the combo with dispel or apostle and use the activate abilities on the artifacts to survive and wait until it is safe to go off.