BigReactors Turbines are great for anti-lag. Nice bang (power) for the buck (lag). Just need decent steam.
Railcraft boilers make a good amount of steam. Just need 3x 36HP to fully power a single max. BigReactors Turbine. 4 Turbines (8000 mB/t) means 12 boilers (8000 / 720 = 11.1111).
To power those boilers, Refined Bees are among the lowest lag. Just need a few framed Alvearies or Gendustry Industrial Apiaries.
But, I'm sure there's other ways to make lots of steam.
Total system power for 4 turbines should be over 100,000 RF/t with default 1.6.4 BigReactors 0.3 values. Assuming PowerConvertors is using 5 EU : 20 RF, that's 25,000 EU/t.
ReC will make way, way more than that, but RoC and ReC can get very client laggy.
In GT 5, nuclear reactors make steam (finally !). Not sure how much, though, haven't gotten there yet