If you like dripping but hate to drip, the reo is really your only (somewhat) mass produced choice - all the performance of a RDA with bottom feeding for convenience.
The mini is about the same size as the VS DNA30. The grand is pretty much the same size as the rDNA30. If dripping, not size, is your issue, the grand is prolly the better choice - bigger battery (18650), larger onboard
juice storage.
Many of the same RDA's you'd use on the VS are available in bottom feed modded versions - atomics, cyclones, magmas, odins, and more - plus Rob (the manufacturer) has a stable of bf-enabled atties, called reomizers or RM's, that unlock the potential of the device.
Flavour, clouds, convenience, simplicity, durability, versatility - it's all there with the reo. You're not losing a thing compared to a RDA on a DNA, just gaining a ton.