El Diablo make a few different RDA's. I don't have any of them but you could try a 0.5Ω build and then play with the wattage. Here's a calculator:
Steam Engine
Lower Ohm Coils Will:
- Heat The Coil Faster
- Produce More Vapor
- Drain The Battery Faster
- Use E-Juice Faster
- Produce A Warmer Tasting Vape
Higher Ohm Coils Will:
- Heat The Coil Slower, Which Will Produce “Less” Vapor
- Provide A “Cooler” Tasting Vape
- Use Less E-Juice
- Prolong Battery Life
A variable power battery (voltage and/or wattage) is advantageous in being able to adjust the power output to the user's preference. Not all flavors taste their best at a single fixed voltage. For example, most fruit flavors are best at a lower power setting, while flavors like tobacco or coffee flavors may taste better at a higher setting. However, this is very subjective to the individual vaper's personal taste.