I like 1.5-2 ohm dual coils in an RDA on top of my Noisy Cricket. Mostly i use 28g Kanthal for these builds, it vapes flavorful, the wire is quick, Amps are at 5.6-4.2. Stacking -more so on a hybrid mod- has its risks, but high voltage, high ohm vaping is a pretty descent thing, imo.