This isn't meant to be an informed post but I had a Huntsman and went through this maybe a year ago, and ended up buying a regulator. Diff angle than Motorhead presented.
I am of the opinion that the Huntsman/Regal and other DS guns (but not all anymore, and not speaking to the electronic versions, there are other factors there) really do benefit from the slingshot system and are balanced pretty well. The shot curves on the these are usually far more sedate than many/most other unregulated guns. My theory was simply that if the regulator was set to deliver shots at or just above the lower end of the shot curve (beginning and end) that you'd see some benefits with some limitations. The shot string (curve) should be flatter and you should get more shots, The shot increase under my scenario still depends on how much the reg limits the power AND while the curve would be flatter, the highest part of the curve would be reduced (less power) to whatever the reg allowed... which in theory would save air and provide a few more shots.
All of this is just me (a home hobbyist) thinking. But it all fits the DS and regulator molds. One more thing I'll add, this sounds like you are thinking new purchase and assume AOA as the vendor. They are good, but I would ask if they would find the curve on the gun you order and set the reg up appropriately and/or to your desire (again, I don't think you could go over avg power for this gun anyway, but you may be able to dial it back). OR be willing to do it yourself.
I sold the gun before it came to the top of my 'next' list. Basically gave the reg away. So, no real world info.