I burned through my stash of lightning shards leveling Weaver to 50, so I decided to start leveling Miner. My question is, strictly for the purposes of farming/selling shards is there a benefit to leveling Miner past 20? It looks like the double shard abilities set in then.

I understand the potential farming benefits of being 50MIN, I'm strictly looking at this from a shard perspective. Or from an experienced Miner, are the benefits good enough to warrant leveling to 50?

Any help would be appreciated, thanks!