I like the concept of a 10-unit bankroll parachute to compound the unit:

Spin	Location	Bet amount	Loss + cost	Amount won	Total profit
1	Half	1	1	2	+1
2	Dozen	1	2	3	+1
3	Line	1	3	6	+3
4	Line	1	4	6	+2
5	Line	1	5	6	+1
6	Corner	1	6	9	+3
7	Corner	1	7	9	+2
8	Corner	1	8	9	+1
9	Street	1	9	12	+3
10	Street	1	10	12	+2

There is no limit on wins. After a lost attack, you go back to the minimal unit bet.

The basic idea here is to have concatenated positive runs of micro-games rising the unit in order to win the most on the positive trams, while going back to the minimal base unit for losing the least on the inevitable negative trams.

After every hit you take 50% of the net win and re-invest it (add it) into the main/active attack bankroll. Dividing the new units / 10 to get the new bet amount.

It is advisable to play with an unit that is as divisible as possible in your roulette of choice. Ideally it should be divisible / 10.

Rounding down should be done for keeping the bets working on actual game conditions.