On mine I have your most basic build : 26g, 2.4mm,6 wraps, dual coils @ 0.28ohms. Wicked with Jap cotton.
I get tons of flavor and thick vapor at around 35-40 watts on my Sig 150. I need to experiment more with my builds. Not interested in something that looks like a sheep rolled in barbed wire, but I have done a couple of Claptons.