maybe 27" draw would be the cut off where these don't work for Alexander above I use heritage 150's cut 29" with a 100gr insert and 125gr points out of a Palmer classic that pulls 50@27,, they bare shaft perfect so it would depend on the bow but I would guess it would be "at least" 225grains up front for you if yor using fast flight strings.
I have 29" 90's also I use with another bow a 63" soft recurve thats 48@28 (45@27) dacron string the 90's bare shaft tune perfect with 200grain points and stock inserts.
so I guess you could use 90 or 150 it comes down to how heavy of a arrow you want, how fast you want to shoot they would both work.