I currently use both mechanical mods and regulated mods. Both have their place, function, and good or bad points. My mech is what I carry everywhere and my sigelei 150 stays at home and on car trips. Mechs are freakin bulletproof, where regulated mods will absolutely, positively break when you least expect it. Mechs are like firearms where regulated mods are like tv's. A firearm can last hundreds of years, where your tv will break much sooner.
Heres the explanation you need to hear.
In mechanical mods and related coil builds,
YOUR COIL IS LIKE A GARDEN HOSE, YOUR BATTERY IS LIKE A WATER TANK. OHMS IS THE WATER RESISTANCE
Thicker hose and/or shorter hose, means less resistance. Thinner hose and/or longer hose, means more resistance.
You can use a very thin, very short hose and get very little water resistance. You can use a much thicker, much longer hose to equal the same resistance. A decent water pressure is dependent upon a happy medium.
Your battery pushes electricity, your coils resistance to it will determine the power you get. Ohms are the resistance to that electrical charge. This is why your evod coils will vape poorly on a mechanical. 1.8-2.2 ohms is alot of resistance for a 3.6v, 18650 battery, and it draws very little power. If your resistance was lower, like say .7-1ohm, your evod vape experience would be much better. This does not account for the compatibility issues, its just coil science.
The gauge of wire used is crucial to the power you draw and to make a coil with enough surface area to vape well. A very thin gauge wire would take far little to make a coil with enough surface area, and a very thick wire would take far too much.
Does this make any sense? Any questions about how it works, please ask.