sustanon is 4 esters. 2 short esters, 2 long esters. if you are going for just 10 weeks you are better off using another kind of test otherwise you won't get to enjoy the 3 week ester it has. so no sustanon actually isn't the best choice for tren especially tren ace.
i would use a short acting test with tren. or use masteron prop, or use an oral like winny or var..if you use ace (which you should use for your first time with it) .. it should be 7-8 weeks MAX, thats all. then come off and PCT. see how you do. if you run sustanon for 7-8 weeks you won't even get to enjoy that incredible 3 week ester that comes with it at all.. sustanon should be run a minimum of 14 weeks .. a great idea to use with EQ or primo which need to be run a while as well but not tren IMO ... the gains you would get from a tren/sust stack under 8 weeks are mostly from the tren itself, and very little from the sustanon.
and I hope you know to use anti-prolactin as well.