The beautiful thing about regulated devices is that unlike mechanical mods - tubes, parallels, and series - you can build in any resistance range you wish to as long as it above the minimum resistance your devices chip will fire. I believe the RX fires anything .1-3 ohms
Regulated devices, especially one with the capabilities of yours, is not dependant on a certain resistance "sweet spot" like a mechanical mod would be.
While I'm unfamiliar with the baal atty, I have the Griffin and an IPV (almost identical to your RX as far as resistance range and wattage output). I have build my Griffin from .1 up, I currently have a .48 build in but I usually keep it around .25.
The only thing that changes is the wattage required to fire the Griffin to get your desired vape. At that point if you're building towards .1-.15 you'll be asking the device to fire 100+ watts to get a good vape, which can take a toll on batteries if you aren't using quality and safe batteries.
As neuner said, you have Sony, samsung, or LG batteries in there you've got no problems going up to the 160-200 range.
If this was TL;Dr ::
You can build any resistance you want with your mod, as long as it above the .1 required for the mods chipset.
JUST MAKE SURE YOU USE SAFE HIGH QUALITY BATTERIES if you intend to push high watts to the coils.
Matt