I would recommend your choice of DoL to 50 first before getting into DoH. Your DoL can help support your DoH financially. And while DoL is a quest is tedious repetition, just get some kickass music, a good TV show, a well-written book, or talk to your friends. I actually managed to get excited when I leveled miner.
I would not recommend leveling everything at the same time. At least for me, it makes me feel like I'm getting nowhere and I get bored. Pick one, take it to 50, repeat.
And a tip I learned after leveling two DoH, just because an ingredient isn't in your guild's vendor doesn't mean it won't be in another's.
