Op was asking about lateral deltoids, not traps. Did you kinda just see the title, not read the original post, and simply post your favorite trap exercise?
I personally like kroc rows (and all rows), really, really heavy pulls, (straight weight, off pins, reverse band, against bands, ect) front squats, and carries for that area. I noticed some nice growth lately in that area after added farmer walks/other carries to my training.
Oh, this also comes from someone with traps, and some who oly lifted your weights a year ago while weighing 38 pounds less!
Oh by the way...perhaps you should consider posting about something you know? I don't go in the body building forum and talk about the best way to get a huge proportional body because that is not what I try to do. And you shouldn't come in the powerlifting section and talk about strength, nor should you talk about traps until YOU HAVE TRAPS.
You are progressing though, keep it up.