Change spawn?After like 1 hour if you got nothing good it's wise to change to another spawn/monster,i don't know how much it helps as i just plvl whole day at hawking 2nd island,alot of times the met rate just sucks,30 packs of arrow not even 15 mets.80k monsters not even a DB.While other times a random scatter in MC got me a DB,near full inventory of mets each set of arrows.
Another reason for that,may be because your luck is bad?If it was not like this before,your character must be unlucky for this period,sometimes there are times like this,your luck gets real bad,stopping for awhile may help.
Hope that helps