Fletching

See Ammunition

See Alchemy for oil recipes.

whittle + wrapped = 50 heads

Bundle of heads + bundle of shafts = 250 arrows

Recipes

Arrow Head type + Bloodseeker Oil = Greater Arrow Heads

 Quicksilver = Bloodseeker Oil

Arrow Head type + Elemental Oil = Elemental Arrow Heads

 Brimstone = Acid
 Turpeth = Fire
 Colcothar = Frost
 Cobalt = Lightning

Greater Arrow head of any type + Elemental Oil = Greater Arrow Heads

 You can't increase the damage of elemental arrows by using a higher damage arrow type like armor piercing.
 It's best to use regular arrow heads for this.

Greater Arrow heads + Bloodhunter Oil = Deadly Arrow Heads

 Stibnite = Bloodhunter Oil

Greater Elemental Arrow Heads + Bloodhunter Oil = Deadly Elemental Arrow Heads