I just don't think steam machines and immolation work well together. Immolation is all about short term quantum, but steam machines are for long term damage. Immolations are faster than quantum pillars for the first three turns, but pillars generate more quantum after four turns. Steam machines, however, start out weak but are very strong after four turns. I think that if you want to use steam machines you should use pillars because it will pay off in the long run.