Which to come off first?

Hi folks,
I'm new to this iste so bear with me. I'm in the UK and was diagnosed with major depression over a year ago, initially seemed not to respond to anything and landed up with p.doc prescribing a fair cocktail before thngs improved. Six months ago was on citalpram 60mgs daily, quetiapine 100mgs daily and reboxetine 8mgs daily along with diazepam 5-20mgs daily and temazpam 20mgs at night. I began to function more normally and cry less though obviously with ups and downs. Have been very gradually getting back to life/work, still seeing p.doc and CPN and recently started therapy with psychologist. My aim over recent months has been to try to clear the "brain fog" . Now reduced citalopram to 40mgs and the quetiapine down to 50mgs at night. Have gradually weaned off diazepam and am down to 2.5mgs daily.
Next time I seethe p.doc he promised we could look at reducing one of the ADs (I have struggled with side effects all along). My question is what would you reduce first? It seems like it may take me a lifetime to gat off everything, but do I reduce the reboxetine or the citalopram. Do I come off the diazepam altogether or aim to get off quetiapine ? After >12months on temazepam (and it doesn't do much) will i miss it much if I stop.
Am keen not to cause any functional disturbance because have been coping with a small amount of work and don't want to upset the very precarious balance?
Any ideas?
Thanks.