If you will use it for racing, I dont think you can have a 13 as your biggest kite for lightwind days. Sorry. Maybe for freeriding. But for race a 16 is minimum. 17 or 18 and even 19 for some prefered. If you only want a 2 kite set-up. Then maybe 11-15 is the one giving you the biggest possibilities? But 10-13 is a fine start, and makes it easy to ad a 17 when you realize you need it
That will be harder with the 11-15 combo. Here you will have to ad the 19 which could be a killer?
Regarding the Draft 14 I must say again, it is a damm good race kite even it only has 3 struts. As I wrote I was in the high end of the kite, and it did not miss 2 extra struts at all. Just had the advantage of a lighter kite. I am still smiling from my session yesterday
Really looking forward to try the 17 to see if they have hit the hammer here as well. As it is somehow more difficult to make the bigger sizes work right. But the 17 I think will not be available before beginning of summer...