For 2.4ghz - choose 1,6 and 11 ( non overlapping ) +20 mhz only ,dont use 40mhz
For 5ghz - choose channel 149 - 165 ( less interfere ) , instead using a 36 - 48 which is common na to
Baba mo na ung TX power mo to lowest like 20% ,pra di magkabuhol buhol o mag bang gaan ung signal monat ng kapitbahay