I press a lot, using Thibs layers system. I've found that it maintains my trap mass just fine without any direct work.
Also, I do LOTS of targeted rear-delt work, and since I begun doing that, my shoulders look so much thicker and balanced.
Face pulls are great, I use em, but my weapon of choice for rear delts is the reverse pec-dec flye. I'll do at least 4-6 sets on this 3-4 times a week, using constant tension and varying reps ranges. Eg 6 sets of 6 heavy, or 4 sets of 15 using a extended sets HDL setup of say 10 reps-rest 15 sec- 5 reps...done (that's one set).
I love doing huge all-out-bring-on-the-excrutiating-pain monster drop sets (Meadows style) once a week too. Reverse pec dec flye works GREAT for this