There are different types of arrow shafts to consider…. Woodies, carbon, and aluminum. After you decide which way you want to go, then it’s a matter of preference on arrow length and tip weight. For 150 grain tip without any additional insert weight added you will need a longer arrow to get the right flex. I’d say 500 spine carbon full length to start will get you in the right range… you can add insert weights and shorten the arrows to fine tune the exact spine. This will increase your FOC. I buy 100 grain brass inserts and cut them to length to adjust spine and tip weight with different length arrows….
You can make it as complicated or simple as you want. …. Kirk