Few factors here. How heavy is your arrow? How fast is it traveling? Best I can say is figure your drop on flat ground and adjust that at whatever distance you shoot from elevated. The distance you measure on the ground is shorter that the elevated line of travel. The higher you go the less drop due to gravity effect. That’s shooting at the same distance just elevating your release point. Go get a range finder with a drop compensator. Easy way!!
ive never been able to tell a noticeable difference your not gonna be far enough up the tree for it to matter wonder how many deer been lost to overthinking
Biggest mistake everyone makes is not bending at the waist to make the angle. I’ve got a yardage compensating rangefinder and the most I’ve ever seen it compensate is 3 yards.