Sshhhhhh, don't tell anyone. This is top secret
Seriously, I've been vaping predominantly gennies and an IGO dripper with 27 gauge Kanthal for a while now. Properly set up I can't beat the flavor I get from them with anything else I've ever tried.
I use micro coils on the IGO. I find you can drop the power in these to around 15 watts and have about the same performance as a genny at 20. It means you can use a fuse if you want and you'll only trip it with a real good short.