Morandirs right, if one is determined to keep nic mg low, the manuals are prob the better choice, along with a horizcarto. And i also found no flavour to give a better TH... Add flavour and the hole thing softens... Or maybe because i only do the sweet ones..
My setup is
reg kr8 autos
2,8 ohm carto, vertical coil cus cant get the other ones here.
8-10 mg nic in 100% VG
Gives a very decent TH. But did up the nic level, when i went back to vertical coil. On horiz carts i was on 4-5 mg.