FOG was never designed for Bishops to grind there, so if you're going to farm there or leech someone there, then you should just learn to NPC arrows more often. You're a Bishop, you have Door (or I presume you do) and you can just go Sleepywood and NPC them. Or hit "trade" and dump the whole lot in the FM entrance, where some newbie might just be glad of them.
It happened on my archer and xbow characters too, ironically enough. Each few golems seems to drop a hundred arrows, the use inventory fills in no time there.
Also, all you need is to loot 1 of each of the scrolls golems drop then it doesn't matter if your use is always full. You will still pickup more scrolls. I suggest you buy 1 gfa 60 before starting.
Stop joking, I only edited my meso bar. I didn't even need to post a screenshot to make my message obvious enough in the first place anyway.