Hey,
Are you fishing hardbodies or plastics? I find fishing mainly hardbodies, I fish the local walls with as light as 3lb fluro straight through so I think 8-10lb is overkill, even for flathead. I find a happy medium is 4lb braid with a long 4-6lb leader.
I managed a 85cm flathead last year off a wall with 3lb fluro, so you do get lucky