I would recommend that you unhook Trigger Maru for now and learn the game stock first. RSRD and ROW would be fine as they don't make the game more difficult. But TM is graduate school for sub skippers, not first grade. Don't worry, it will wait until you're ready. Duci is preparing a nice airplane depth charge party for you at periscope depth when you're expecting it least!:rotfl:
But refine your technique on DDs without fangs first, then move up. You can't learn anything by getting killed instantly.