i have been experimenting with 30mm atomizers on single battery mechs a lot this year. the ijoy 26650 is the way to go (or it was the last time i looked). the challenge (imo) is efficiency. most of my 30mm atomizers are tanks that work best with larger builds, and i like to try to balance it out so i can get at least one tank-full of juice out of one battery charge cycle.
my 'the tank'/chi you megan combo has 3x27 n80 aliens in it, at 5.5 3.5mm wraps its .15 ohms and it can do a 5ml tank on one battery. ramp up is not as instant as a smaller set of coils at the same resistance, but its a nice mellow vape in 'the tank' and i really like it.
i just posted an alien framed staple build a couple days ago on the aromamizer plus for 21700 tube and it sucked. ramp up was so slow that it killed efficiency and it took almost two batteries to finish 5ml tank. i replaced it with a framed multistrand alien with 2x28 n80/13 x 42 ss316/40 n80 at 4.5 4mm wraps it comes to almost .2 ohms. it can do a whole tank on one charge, ramps up quite a bit faster than the last build, but still a tiny bit slow/cool for me. they are good, but not great.. im gonna try it with maybe 20 x 42 ss316 next time, or maybe with 27 n80 frames. either change should bring it down to closer to .15 without adding a ton of mass. hopefully the extra few watts makes them light up better and doesnt kill efficiency.