Its quite obvioust that something needs to be done here. Either allow DOL's to gather higher volume of shards or allow us to obtain them by some other means where BOTs dont have access. Gate it behind a level 50 sidequest or something along those lines.
Timeworn maps drop very healthy amounts of shards, I'd assume that serious crafters do at least Goatskin/Toadskin/Boarskin once per day? Granted they are random, but you get a few hundred shards for 5 minutes work.