The Dripbox 160 is a bottom feed (Squonk) mod, which means, instead of having to drip new juice into the RDA, you squeeze a little bottle in the mod, which feeds the juice through the bottom into the RDA. However, the RDA that comes with the mod sucks. Therefore you would need a suitable BF RDA, e.g. Velocity V2.
Big clouds depend on your coils, rather than the wattage. Although, you might need more wattage for certain coils, in order to heat them effectively.