As far as I know, Lurker did not expect for a gamer to use RSRDC with OM. RSRDC is made for the American side of play......OM is made for the German side of play. They were not intended to be used together.
Your list of the five OM mods are in the correct order!
As far as the German torpedo settings, you may try to set the depth lower. If this doesn't help, the issue is in the German Torpedo files, which you can adjust with the use of "Silent 3ditor" found
HERE.