By the way,what do we do when we encounter zero,2 options
e.g
1223 We play 2
1032 we have a zero,we either we re-track or play dominant with above 4 spins , so play 2
1332 win on 4th spin.

For me playing dozens an idea is this way,track dominant in 4 spins then to play it,progression 1122 ,1123 or 1234 But the first progression on 4th spin we get our money back.
e.g
2321 play 2
2113 win first spin play rest virtual,then play dozen 1
2313 win on 3rd spin play next spin virtual.
etc..

this is being played for real in a casino?