Ok so I looked over some aquascaping principles, and I want the Sword to be the focal point, and I also want the tank to have the concave look (higher on the left and right sides and lower in the middle).
So I think I'll just let the Crypts on the right grow to as tall as they can, then possibly move the Sword over a tad bit to the right. Maybe I'll keep the Blyxa in the middle and keep it short
EDIT: Wow, I used the 1:1,618 ratio for figuring out the focal point, and my Sword is just a couple inches off from that point