CottonMan Mavaton's Select (120 gram bag). It's the best cotton I've ever used for wicking RBA's. Tried all the cottons, found the CottonMan in 2015 and was blown away. Near zero break-in time. No off-tastes. Wicks last much longer, 20 days with my flavored DIY and about 30 days with flavorless.
Aspire Kumo RDTA + Aspire Mixx SBS mod.
Both were released by Aspire Prestige. The Kumo RDTA was designed by Steampipes (Germany). The Mixx SBS was designed by SunBox (Italy). Aspire Prestige manufactured each.