I started out with a Sentinel M16 Clone from FT but I'm looking for a new harder hitting high end mod. What do you guys suggest?.
Am from Hawaii as well - Waipahu originally, though now I live in Texas and the UK. The thing about mechanicals is there is no type of control over the power coming from the battery to the 510 threads. So more or less you have, say, an 18650 battery pushing 4.2 volts or so to a 510 connection regardless of what brand/type of mech you use.
So, if you want a different "hit" or more vapor, etc you need to change something other than the mech itself as it it only a metal tube that holds a battery and has a 510 connection to hold a tank, and the difference in the metal used for the contacts is very very minimal - as a matter of fact aluminum has better conductivity than brass, though it is not as strong, and while aluminum is several times more conductive the overall difference is not enough for a human to notice in a vape. Tiny tiny fractions of power. So, since it is not the metal used for the current, and it is not the mech body itself that will make a huge difference, what do you do?
There are 2 ways to go if you want to stay with a mechanical - a kick or lower ohm coils, or both. A kick is a little circuit board which fits in the battery tube at the top end and which turns the mech into a variable wattage device. There are a couple of different brands of kick, and they don't work with all mech bodies, but with a body that they do work with they can increase the wattage and push the coil a bit hotter and get you some more vapor and heat. Of course a cheap VV mod can do the same thing, and a kick goes off the purist mechanical track anyway by making it non-mechanical after all.
The other thing you can do to increase the hit, flavor and vapor in a mechanical is to lower the ohms in your coils. This is where you see a lot of "sub-ohm" coil talk with regards to mechs which can't be run on a VV mod. I have both VV and mechs and I mainly use mechs, but I don't generally go below 1-1.5 ohm coils myself, and have no need to go lower for the hit, vapor and flavor I want. Some people go well below .5 ohms, and everything in between .5 and 2 ohms. Everyone is different.
But you would be incorrect to think that a Sentinel would be able to "hit harder" than your M-16 with the same battery and tank. It is only a metal tube holding a battery after all.