i know with the provari, it has a 15 watts limit or 3.5 amps. from what i have heard on this is basically whatever comes first is a cut off, it will not produce anything over 15 watts nor 3.5 amps. i absolutely have no idea with the vamo, so i do not know.but it would seem that the 5 amps would be wasted if you cannot exceed 15 watts. i just wrapped a 28g 1.5ohm coil @ 5.0volts & 15watts, max on provari. what i noticed is because of the 7 wraps you get a delay compared to a lesser wraped coil, its just a little bit more unresponsive. also the device gets hotter, and the vapor gets alot hotter, also the throat hit is much more intense, for me its definately to the point of being like i said before harsh, but if a hotter vape and intense throat hit is what you want then this set-up is the one. now you would think with more volts and amps you would get more vapor, i didnt see it. to me the amount of vapor in a 1.0 ohm 4 wrap 28g @3.6 volts is no different to a 28g 7 wrap 1.5ohm coil @5.0volts. finally the taste of the lower resistant coil imo was better, i definately believe that more turns of wire on a ss mesh wick at higher volts produces a more metalic taste. you might say it could be from a poorly wicking wick, i use 500 mesh, and wicks like crazy. maybe a gravity wick of 270 or 325, with a big center hole might produce different results. i dont know, everyone is different, and have different results, there is no right or wrong way for sure. but i have tried so many different set-ups in the past 8 months and every time i find the best vape at definately 28g, no doubt the best flavor out of any of the wires that i have tried(28,30,32,36). also 1.1 ohm to 0.08 ohms at voltages between 3.3 to 3.8 ish, imo it is more mellow when talking about throat hit, but a thick vapor with max flavor.