If you are using off the shelf atomizers on your MVP, a mechanical mod isn't going to give you a more intense vape. Set your MVP to 4.2v- that is the voltage a fresh battery in a mech mod will give you. Take a few puffs, now drop the voltage by .1... Keep doing that every few puffs. Now you will know what a mech mod will give you with your atomizer.
More efficient toppers will hit harder and give you more. Try a dual coil protank 3 or aerotankif you don't want to deal with rebuilding. It will give you a better feel for what dual coils (or even a better single coil will give you- a well built single coil in a good rebuildable can be very efficient- I went from vaping 24mg nic to 6mg moving from off the shelf devices to rebuildable). If you want intense flavor, little hassle, and good performance- follow Baditudes advice on carto tanks
If you ever want to go down the road to rebuildable a, I recommend starting by getting a cheap dripper and use it on your MVP while you learn the basics...and read, read, learn and know battery safety, as when you start dealing with mech mods, you have no protection. A shorted coil (or very low resistance coil)+ a poor quality battery that has not been maintained properly, in a mech mod + running too long = potentially explosive device next to your face. The regulated mods like the MVP (and my favorite, the ProVari) offer great protection, and a more consistent experience (fresh charged battery until time to recharge- the output to your atomizer is what you set it at. )