What clients are supporting ch. 144, 120, 124, 128? Using these in reuse plan will just create coverage holes for MAJORITY of clients since not much support for them. Also you lose 3dBm of snr for each bond. This will lead to client issues and just drag aggregate throughput down for the cell since these clients won't be able to get on/off medium as fast due to poorer snr. For fast efficient wifi is all about spectrum planning and management. I can see corner cases for 80 in enterprise but 160 should be left to trying at home and even then depends on neighboring aps and what channels are in use.