DislikedI often use a 1-3-9 progression on rescues when the retraces are shallow, but it can land you in a heap of trouble if you get it wrong and don't have enough ammo left after the third level. That would usually be time to pull the plug, a la Vic.Ignored
My skews are pretty similar to yours... but on the third level of rescue, the market usually goes into a ranging phase (aka exhaustion/consolidation) and I will determine the number of troops based on the range than (could be anything between 9-20).
regards