Single shreck pricing would have to be between 150-180 (Could start at 160 and see where to go from there). Price increase should reflect the available buffs it can receive via doctrine and platform it is on, like (old) AB riflemen v normal riflemen on sticky pricing.
Individual decisions can be good, while still being very isolated. This would be a good rule, less so a unique targeting.
Historically sound though, I fondly remember the days of the increased default sticky range for infantry doctrine.
A uniquely strong capability may also be the part product of something to compare with. The logical difference is that somehow between the faust and the sticky, there is a engine damage ability that is hard transfer the value of from one faction to another available one.