While it took me longer than expected to earn enough to open the previous pack, this time I got lucky and with earnings over the 60th percentile a couple of times, was able to buy another pack in double quick time.
All three cards aren't in my collection at the moment so that adds to my diversity score. Silent X adds another 100 or so fans which will help with the earnings a bit. Not by much, though.
To really increase the earnings, it would take a couple more Epic cards and add about 1000 more. I estimate the next one will come in maybe another 8-10 packs.
With Hive prices depressed, it could be a good time to spend it on some Epic cards on the market. Still searching for some good deals like the one I got for Debbie.