965 dont think so. Alot of stops, not useful for manual buses,
will wear out the clutch quickly. 171 and 969 very possible, both
have few stops in some places and their routes are rather long and
straight, 969 got go on expressways somemore. 188 and 190 also can.
As for 960, the route would have to be amended to serve more
passengers (not for the service lah, for the K124IBs one 
) .
Why not buy the 3 axle-ed K124IB? Instead of making it 12m DD, make
it 15m, like the B10M long.
Actually, high floored buses CAN BE WAB. Some modifications
had to be done at the busstop. For example, in the US, busstops
have elevated platforms, so that the platform height is the same as
the bus platform's height. Then a ramp is linked from the bus stop
to the bus. Seen some pics with such configurations, but its on
trial only. 
