BG
You can do what you want with the Teeny 200. That's what I striper fish with and I fish down to that depth. However, that deep, you may want to go with a shooting head system or the full sinking line. I really don't enjoy fishing much deeper than 10 ft. or 15 ft at most with a fly rod though. One thing you might want to keep in mind is to keep your leader short, say, 3 or 4 feet because if your fly sinks slower than the line which it almost always does, and if you have a long leader the fly may be well above the line which defeats the purpose of a sinking line.