Hi Noumani,
you can achieve the 10/8/6 config with three 2206 cabinet ;
cabinet 1 will take care of the sector with 10trxs and a cdu-f combiner will be ideal, the IDB will be configured for 1*12 but ties 10&11 will be deactivated
Cabinet 2 will take care of the sector with 8trxs again cdu-f combiner is used and the IDB is configured for 8+4 only the first two combiners will be used hence ties 8,9,10,11 is deactivated
Cabinet 3 will take care of the sector will 6trxs likewise cdu-f is used but the IDB is defined for 2*6 or still 8+4 and the used tie positions deactivated.You can refer to me further clarifications
br.
Michael