Due to that bow is unstackable item, you can't craft 64 dispenser once. You can only craft one in one time, that leads to serious difficulty to craft a large amount of dispensers rapidly. However sometimes a farm actually needs a large amout of them.

I suggest advancing the easy crafting to enable players to craft items like dispenser by simply shift+rightclick, instead of putting bows for 64 times to craft 64 dispenser.

Another advice is that make unused and unenchanted bows stackable, like empyt maps. This also helps to craft a large amount of dispensers.