Tx power adjustment rt-ac5300 and rt-ac88u

hi guys

just doing some testing with the above two routers and im running the 88u as the main router and the 5300 as a wireless access point

see my floor plan below

https://onedrive.live.com/?cid=7D5C...1a0742!812&parId=7d5cb240be1a0742!144&o=OneUp

88u is in location A

5300 in location D

to avoid overlap i have been using the Tx power adjustment on both units but it doesnt seem to make a great difference

with only about 10db difference between...

Tx power adjustment rt-ac5300 and rt-ac88u