I'm fairly new to rebuilding too, but I've noticed when I make a build I'm more comfortable making I get better performance. Like twisted kanthol parallels do it for me, even though it takes a bit of fiddling to get the wires to fit together. But one friend uses 22g five wrap sleepers, and another uses 8 wrap nanos made from 28. Play around with different builds and see what you like, and I recomend making single coils and comparing them until you find the one you like, it takes a lot of the work out of the tinkering. once you find the coil you like go all in and make a duel or quad and try it out all the way. Just remember be safe! don't want to hear about you in the news XD