You may want remove the rda, and carefully loosen, straighten, and retighten the coil.
Wicked and wet this may be a bit messy - but it's possible you don't have perfect contact. Those coils are pretty uniform, and should be right around 0.18 to 0.2 ohms.
As far as settings - I'd start at something like 35 watts, and then go higher until happy...
I am vaping mine at 45 watts.
My coil read 0.18 on a reader, then read 0.2 on the device when I started using it, and now reads 0.21 (slight increase in resistance after use is fairly normal).