After many hours of hard thinking,
I think we need a bet-selection , which
ALWAYS PRODUCE HIT WITHIN MATH EXPECTATION.

In roulette the HE of 2.8, or roughly 3%,  then
if your selection is STABLE, then in next 100spins risked bet,
you lose 3units flatbet....as end result...

100spins risked is too short, 300spins risked, is more STABLE.
THUS, if flatbet, only lose around +-10units.

If you can't understand,
then in OVER-SIMPLIFIED EXAMPLE.

in a bag, there 48red, 48black & 4green marbles.
to simulate HE of 4%.
Take out a marble as a bet, and cast aside,

Thus , no matter how many seasons, at last spin, the math is lose-4units.

So play a billion seasons,
you will see billion of permutations, with whatever possible random, extreme variances,
streaking, chopping, but the result, at the end, alway lose 4u, never win.

So its up to us to bet a STABLE SELECTION, by waiting and watch the random, extreme variances,
streaking to happened first, before you starting bet faithfully.

Now, the real trillion dollar question...is..
Do you have..
STABLE BET SELECTION!!!???

If your selection win 10+unit this season, then lose10+ units next season, then it is not stable, it is unstable, and if you bet with progression, soon you lose your upperwear and underwear!

Bet a fixed EC,  is deadly, since they could swing from winning huge to lose huge.

I tried testing , albeit only short sseasons,  few method , which I "found" quite stable.

(No, puhleeeez, I not promoting or affiliates, nor selling anything anytime here)

Pinwheel , quasy random dz, ..are  quite stable in 300spins
Ftl  and ft2nd last  could take advantages of long streaking, when you outwait the losing sequences.