You asked for down-wind advice. However, first: after takeoff and rollers, approaching the turn onto downwind (750-1000') get the power back to 80% (even little less) = 1000fpm otherwise the a/c will rocket through 1500'. There will be a massive nose down as you haul off the power and you enter downwind out of trim. You're at F5. Try 5.5 & 55% or 6 & 60%. Easy to remember. The accurate figures for the day will be between these. Keep an accurate distance from the rwy and make sure you track //. Trim is always the key. Accurate power and trim = acurate speed and level flight. The a/c flies itself and you can relax and look out of the window, just checking inside at the parameters; include N1% in scan. It will depend on how your company teaches base leg, descending or level. On finals nail the pitch & power for landing config quickly to allow accurate triming. Pitch/attitude flies the glide path, (V/S) trim maintains that attitude, and constant power = stable speed and stable trim. You just guide the a/c in roll to the smash point looking out the window, and scanning inside every few seconds to see everything is where it should be. If the attitude is wrong, the V/S will be wrong (and visa versa) and the glide path will change. You can correct it before it has chance to do so. Same with N1%.If it's wrong the speed will change, and then you are into power/pitch couples. Correct it before the change has happened. Make only small changes and fly with your finger tips; not gripping the yoke like you are Dirty Harry holding a Magnum 45. Then you can feel if the trim is correct. All this allows you to relax and breath properly, and put the centre line between your legs.
But surely, if you've been training circuits in the sim, before the live a/c, these things would have been practiced; or have I missed something? That's what sims are for.