@ MrSelf Destruct:
A mech mod differs from a regulated mod (e.g. SVD, Vamo, SiD, Provari) in that it has no wires and no circuitry. It fires through purely mechanical means. Because the amp limit is decided by the battery you use, and not what the circuits in the mod can handle, anything you can use on a regulated device can be used on a mech. However, not everything you'd use on a mech can be used on a regulated device.
@Preloader
Whether or not you use a Kick in your mech is a matter of preference. If you use standard resistance coils, a Kick will basically allow you to turn your mech into a regulated device. However, the wattage you can vape at is limited by the capabilities of the Kick (max voltage and amp limit). I may be incorrect, since I can't load the Evolv website for some reason, BUTif you're running 0.9ohms at 3.7V (15W) on a mech, you're already exceeding the capabilities of the Kick (10W). As far as what the resistance of your coils should be for a mech--whatever gives you the vape you like. If you've used a regulated device before and know what wattage you like, use that as a starting point and adjust.