I like maple for heavy arrow,,
cedar for lighter arrow
douglas fur and sitka spruce are good too
sometimes dowels that are straight are good,,
I have some birch arrows that are nice as well..
I think if the shaft is good and straight any good arrow wood is good,
I have some mahogany that is straight and shoots well,, have had some good hickory too,,
you could use a lighter tip to increase spine of the arrow
you could shorten your draw,,probably if you face a bit more forward ,,,or simply dont pull the bow so far,, put a mark on the arrow where you want to draw too,,