So you are betting continously with 3 spin mini games?
This is the unit level I would be using for the 3 spin mini games. 10 30 90, with 1 3 8 as insurance on zero at each level. This way if the zero hits it is a bonus. 15 25 and 20 profit on each level. There is obviously an overhead on each win on the dozens as well, but in this case I think it is worth it.
If you use GLC's progression ideas with the different levels of progression you would need to recaculate the insurance amounts to compensate.
How i play it is this:
When i arrive to table i bet against dozen 1. If i win i sit out the next 2 spins and wait for the next 3 spin "mini game"
If i lose i then immediately bet against dozen 2. If i win i sit out the next spin and wait for the next 3 spin mini game.
If i lose i immediately bet against dozen 3
With 0 i bet just enough to break even. Or a little profit.
How can we improve it?
Lets say we arrive to table and the last decision was dozen 2. Can we start there and bet against 3 1 2 occuring? If we arrive and dozen 1 was the last decision can we use that as a starting point and bet against 2 3 1 occuring.
Should we continuously bet against 1 2 3 with no mini game at all? And on any win whatsoever we start over and bet against dozen 1 again? Bet against 1 lose. Bet against 2 win. Reset. Bet against 1 win. Reset. Bet against 1 lose. Bet against 2 win, reset. Bet against 1. Etc