Can medium-fast bowlers and spinners get good results (ie bounce) in Aus and Nz conditions, what kind of bowling will be effective there?

Glenn McGrath is the perfect example of a medium-fast. Make the ball move around both ways off the seam + put it on the same spot on the pitch nearly every time and the batter will have trouble regardless of pace and bounce.

Top class spinners will also be good regardless. If the pitch itself won't spin, but has bounce, use that and the flight. If you can make it dip or drift in the air, that will also cause problems.

well in Australian pitches as far as i know they help fast bowlers a lot since they get a lot of grip and a lot bounce + pace but it may not be very effective for spinners.

A medium pacer with swing will work if hes backed up by two genuine quicks

but defo not all 3 medium pacers like Indian have don in the past what were they thinking

A good combination of pace, swing and spin.

Australian pitches offer all types of bowlers something.

well no really on bouncy tracs you either need quick pace or sharp turn or swing other wise no mediorcity