Seeing as how I can't seem to get decent life out of a lot of the more expensive attys, I just go with standard resistance joye 510s and 306s from vaporkings. They are cheap, perform well enough, and last just as long if not longer then the more expensive counter- parts. Here recently I have fallen in love with the rebuildable attys like the iatty and bulli a2. Run dual
coils on the bulli and single on the iatty.