My specs are identical to yours except I generally shoot 125 gr heads and have closer to 29" draw. However, this is bow dependent and doesn't necessarily mean what works for me works for you.
I am slightly weak with 150's if I make a nice full healthy draw. If I went to 250's I would probably need pretty long arrows though, that I'd prefer not to have.
I have found that a small aluminum footing, extending a bit beyond the insert on the carbon arrow will stiffen it a bit. Increasing or decreasing footing size can tune the arrows some. Footing is a great idea with CX Heritages and I prefer this instead of going with 33+" arrows. Also a fletched shaft will be very slightly stiffer than an unfletched shaft that you tune with, so very slightly weak can actually be preferred.