I draw 28 on the dot,I use wood arrows that match my bow wheight and try to shoot 125g heads,,,45lb @28=45-50.
At your draw length I would use a 45-50 spine for a 55lb @28 bow myself,,,have done in fact.
I know that goes against a lot of popular opinion,,but it was how I was taught an it’s always worked for me.
For extra FOC,,,tapper the shaft.

Plus that nocking point hight as well.

John.