I shoot aluminum arrows and for me my 66", 42# @ 30" Blacktail TD recurve likes a 32", 2215 with a tip weight of 175 grains. The entire arrow weighs 579 grains making 13.78 grains per pound. Surprisingly, a very flat shooting arrow out to 20 yards. This bow has a Dyna97 bowstring with a brace height of 7 3/4".
My 68", 41# @ 30" Longhorn hybrid longbow likes a 32", 2114 with a tip weight of 175 grains. The entire arrow weighs 546 grains making 13.32 grains per pound. Flat shooting out to 20 yards. This bow has a dacron bowstring with a brace height of 6 3/4".
I normally don't take shots pass 20 yards so if you can get your arrows flat shooting out to the longest distance you normally take a shot, I wouldn't worry about too much arrow weight.