SPL

Looking to get an idea of where I should be with regards to SPL (stroke per length) on my 50m sprints. Right now I'm at 17/23 for 50m but I know I need to get that down. I'm thinking that getting it down to about 14/18 without a reduction in speed would be optimum as I'm 6'3" with about a 6'6" wingspan. Does that stroke count sound reasonable? Now how to do that? Here's what I think I need to work on. 1) stronger kick 2) better underwater work at the start and turn 3) Work on becoming longer in the water, both stroke and body position. 4) swim downhill. I've been reviewing my 50m race from earlier this month and I'm still swimming too much uphill. Any advice on drills would be helpful. Paul