Feel free to use whatever you can glean out of my poor writings. I cannot keep them organized. Besides, making and building alky stoves is an old subject. Rand at TD sent me a picture from the Civil War for one a couple years back. It was an older design then that seemed to be fairly effective, though likely heavy made out of brass. Since it was in production at that time, I assume it was based on earlier designs.
Anyway, some other important considerations:
1) Oxygen (or air)
2) Heated Fuel vapour
3) Mixing of the two
4) Some kindling flame, preferably *after* mixing
5) A control of some sort
Plenty of heated fuel and air. Initially, a small reaction, then larger flames as the fuel air warms. BOTH need to react. BOTH need to be heated. Not just the fuel. Whatever fuel you use, a primer, it might be a self primer, is needed. The fuel and air need to be brought to kindling temp before they can react, but some sort of additional spark is required to start the reaction. Some controll of the reaction is needed to prevent runaway reactions (self limiting is the usual methode for small camp stoves like you pictured.)
I was focusing on mixing the fuel/oxygen for efficient burning. Some observations: Swirling seems to add a lot to mixing, and tends to focus heat to the bottom of a pan. The later disipation leads to wide pots, up to a point, being much more efficient than tall pots, but even these can benefit from a smaller, more focused flame. Using a press pin, rather than a drill, it should be possible to angle the jets. In a dynamic flow, this will create a swirl, helping to focus heat, and create a greater degree of mixing turbulence. Adding air inlets into the combustion chamber seems to help by increasing the burn time available to the fuel. Probably not possible on the stove you picture. For some slight modifications to the stove you pictured, turbulence in a semi-pressurized stove design can help, too. I would submit, that the jets should be alternated between the inner and outer part of the stove, allowing more turbulence to the inner, open priming/combustion chamber, and more oxygen to the outer jets. This should have the effect of delaying the burn slightly for the inner, open fuel by reducing available oxygen. And, heating the fuel vapour so it will burn more quickly when it IS mixed with the oxygen. Again, using a push pin, angle the jets upward A slight diameter decrease would also help by reducing the ammount of oxygen available to the inner combustion chamber. The control is important because the initial heat output(for the first minute or so) is different from a stable system. This means that initially a slow burning stove may overheat and become a fast burning fireball(two extremes.) So moderating the maximum heat helps maximize the efficiency and prevents the high secondary heat outputs, and comensurate loss of efficiency, common with small stoves. This is really difficult with the stove you pictured, however. I believe the modifications I suggest will help some. Again, expect no more than 5-10%, though. But, it should also solve the ethanol/soot problem. Higher reaction temps will usually mean cleaner burning, provided the reaction gets enough oxygen. Just a thought...