Usually my builds are single simple coils with 28g SS316L on MTL RTAs, and im vaping with temperature control or not (it depends on the mod) , my e-liquids usually are quite clear - cleen because i mix them by my own, so i don't change the wick, im doing brand new builds every 2-4 tanks / 10 - 20 mls, because i feel them quite dirty when i see them after this type of use... ! I have quite similar MTL RTAs so i vape them in rotation... some times i build them one by one or all together, on my RDAs with similar builds with thicker wire, im doing the same thing i made brand new builds when i don't like the looks of them, so far this type of vaping - use work pretty good for me !