Factory, Sol Ring, Lotus, Sphere, Pass. Tomb, LSG. Hellkite. 2 draws obviously affect turns 2 and 3.
This, unless you have that gut feeling that he could be on blue. If that's the case, then you lead with the Tomb, which leaves a mana floating after the Sphere is potentially countered, allowing you to cast the Lodestone on turn one.
Yeh leading with the tomb seems better. Not only might they counter the sphere, but they could also misstep your sol ring. In these cases with tomb you have the back up of cracking lotus for Lodestone.
