this will be the guide for 99 fletching,
having alods of logs will be a good advantage,
having high woodcutiing would do too!
the advantage with loads of logs will make quicker without having to cut loads of logs (we all know that is boring an non of us want to do that unless you love woodcutting), but you can have up to yew to start off with just use knife on yew logs and try and fletch shortbow, and it works but the best way to do it if you have loads of normal logs. then willows then yews then magics.
having high woodcutting would be better because you can cut logs alot quicker then usual.
EDIT: I AM MAKING A YOUTUBE VID FOR IT TO MUCH TO SHOW IN PICTURES!
Fletching lvl
Shortbow 5
Longbow 10
Oak Shortbow 20
Oak Longbow 25
Willow Shortbow 35
Willow Longbow 40
Maple Shortbow 50
Maple Longbow 55
Yew Shortbow 65
Yew Longbow 70
Magic Shortbow 80
-mike