With the 16g, make a 10 wrap coil then bend it in half so both the leads are coming out from the same end & in the same direction (Basically a dual coil in series). Run one piece of wick up one and down the other, leaving just enough coming out of the bottom to touch the deck. That would be .2Ω (Single coil, or dual coil in series, not dual coil / quad parallel-series). I typically use this method with a 6 wrap (Or 2x 3 wraps, spaced) 22g N80 dual/"quad" coil, comes out pretty low (I forget, it's around the .1Ω range tho) but gives a great
vape. The 18g would take 7 wraps by the way (Both around a 3mm mandrel).
It should be noted tho, you'll need an atty with a ton of space like the MXv2 to fit those beasts in
