Sho' nuff. Splitting that parallel coil into duals might help too. Although I gather that high-rise of an atty likes a center mounted coil better?
Regardless, there's the situation in the trenches. One may spend a bit of time setting up some "maybe this'll work" build for an 8.4V (nominal) setup, and then there's the matter of vaping it for a bit. At such times, sucking harder and bigger and sooner. . . . errrm, sucking more aggressively .. . . may just make all the difference.
anyway, I should mention, this isn't some kind of advice to you, Brian, on my part . . . yer a seasoned ol' vapemonster . .. just chatting in general.