do you know why it's better to build super low on mech mods but not on reg mods??
That's misinformation. I wouldn't say its better using a mech. A mech just allows you to use any build on it regardless of the consequences.
Before high wattage regulated mods became commonplace, the only way to sub-ohm was to build subohm coils on a mech. The lower you built, the more clouds you could create. The early regulated mods just didn't have the wattage power for subohm. However, batteries have their amp limits and using super low coil builds on a mech could be considered dangerously abusing your batteries to the point of catastrophic failure.
The lower the amp draw of a coil, the more amps (converted into watts needed) are required from the battery:
1.0 ohm = 4.2 amp draw
0.9 ohm = 4.6 amp draw
0.8 ohm = 5.2 amp draw
0.7 ohms = 6 amp draw
0.6 ohms = 7 amp draw
0.5 ohms = 8.4 amp draw
0.4 ohms = 10.5 amp draw
0.3 ohms = 14.0 amp draw
0.2 ohms = 21.0 amp draw
0.15 ohms = 28 amp draw
0.1 ohms = 42.0 amp draw
0.0 ohms = dead short = battery goes into thermal runaway
Today, we're fortunate to have very high wattage regulated mods and somewhat more powerful batteries. If the regulating chipset can handle super sub ohm builds, the
protection circuitry of the regulated mods should help keep you out of harm's way. The protection circuity will warn you "ohms too low" for the processor and disable the mod.
You won't have that protection circuitry with a mech mod. It will allow you to attempt any dangerous build you throw at it and you'll suffer the consequences.
The facts are, in this day and age we don't need super low ohm coils to create huge clouds of vapor. You can use higher ohm coils at a high wattage on a regulated mod and get more vapor than you could with super low ohm coils on a mech.