I'll assume this is a MVP 20w, and not an MVP2. If it's an MVP2, you've only got 11 watts, 3 amps and a 1.2Ω lower limit.
As you have 20 watts to work with and a lower resistance limit of 1.0Ω...
Per Steam Engine, running at 18 watts ( a random upper end value, just shy of maxed out), a single coil build at 1.0Ω, using 26 ~ 28 gauge Kanthal A1... you'd have heat flux values of 159, 226 and 320 mW/mm2 - respectively.
Heat flux is the measurement of radiant coil heat, expressed in milliwatts per millimeter squared.
What that means is, you want to look for a RDA that has an AFC that offers the option of air control for both single and dual parallel builds.
A good example of this would be a Origen V2, with 3 sets of AFC inlets.... 1 for singles, 2 for duals.
As you're new... I'd recommend that you click on all three of the sigline hyperlinks below, and read everything you find. If you have questions... PM me.