My pick would be a tanto tip.I like to spin my arrows to check tip alignment and I can't do that with a round or chisel tip.I always want to check tip alignment after every shot in the field.
The trick is to scribe a line from your tip,back so if you clip the point off,you have an established centerline for your new tip.
I then file the angle I want,from both directions,keeping the tip on the centerline.After that,I double bevel each side of the tanto,app. the same angle as the rest of the blade edges.
You can go to tuffhead.com and listen to Doc Ashby's audios from Kzoo,on point tips.Tanto's worked best,rounded were second but he said needle tips probably would work best except they are way more prone to bend or break.
My main reason for the tanto is tip strengthening plus still being able to check tip alignment.