boe stones are 8k on my server....
Ive found 1 boe stone, 2 dragonkin and 1 aquatic all in battle
then ive got at least 15-20 stones in bags doing each and every daily that gives a bag each day. I went through a cold streak after getting 5 in one night early on. got a lot of beast stones, but have got at least one of each with just getting a magic stone today to close them all out from shadowmoon valley's tamer bag(yay for minifernal)
I feel like the drop rate was high to start, they stealth nerfed it for a bit, and recently raised it back. people say rng, but I saw so much of the same from people who had incredible success early on, only to go through a cold streak of 4-5 days of nothing only to now again start to get 1-2 a day.