Hey! Anything cig sized is going to lack power. You'll want to go bigger such as a Kgo (about the size of a cigar) with a low resistance cartomizer (Smoktech 1.7ohm single coil or Boge Low resistance).
The Kgo is an Ego clone, but better than the Ego and other clones because it comes off the charger around 4ish volts and stay at 3.7 volts for a while. Most Ego barely hit 3.7 volts.
The best way to go is to get a variable voltage
mod such as the Infinity Pro, Buzz Pro, Provari, Variable Volt box
mod, etc.