Only did a short test on this one (with good results), so take it or leave it.
Stage 1-the progressive bet
Start out with 4 random single numbers bet in each doz. 12 numbers bet. OK
Next, for each hit, that number is removed. (and no progression for the next spin)
For each loss, a new random number is added and +1 bet on all numbers.
Reset when you reach a new high.
Stage 2 -the elimination process
if you reach this stage, you have 5u bet on all single numbers, and you've not reached a new high.
Now, no progression, only remove each number hit until you reach a new high, then restart.
Really clever. Thank you.
I've been considering something similar for several weeks, but eventually I have not had much success.