Dry works for smaller shots, as long as you monitor the A/F and can properly fuel for it.
Wet shots are meant to include the necessary fuel as you add more nitrous (air) with larger shots (75-100 starts getting into the crossover territory for which you'd want).
Since you're pushing your setup pretty good right now, I'd say consider the 50 dry shot, which will give it a good kick already, and certainly enable you a gain in times. Beyond that, you'd definitely need to compensate with even more fuel and possibly do a wet setup if you went further. The 50 would be a great intro, and I may try the same once I get all I can from just boost on mine.