I've been using the rba deck on my subtank but it's a pain in a half to build on and even harder to wick. I've been looking for a stand alone rta that is easy to build on. So far I've looked at the lemo 2. Orchid clones and goblin mini. I'm leaning towards lemo 2, but am open to recommendations. I also want one that's at least somewhat easy to refill which is why I'm leaning toward the lemo 2.
I would recommend against the Lemo 2. $36 that I threw in the garbage. Mine leaked like crazy around the fill port.
If you want an RTA. I can recommend several.
The Company Youde (UD) makes TGE Goblin, Goblin Mini, Goliath. Zepherus and others.
Of course there are plenty other RTAs such as the
Aqua, Aqua V2
Taifun
Kayfun v1-4, Lite Plus. 3.1, Mini, Monster, Russian 91℅, five pawns.
I use two RTAs the Goblin Mini and Kayfun Lite Plus.