I'm tanking the big guy and our brewmaster is kiting the bats.
Keeping shield up can be tricky sometimes, but usually once you've got it up to max capacity it's all about still having your SotR up for the snapping bites, quake and refresh shield with WoG spam. Was playing around with eternal flame the few inital tries, since the 100% buff to the HoT component might actually do a good job keeping it up passively. Couldn't exactly tell how well it worked, and frankly it was easy enough to keep shield up with WoG.
That said, once in a while you have a pull where you never can seem to keep shield up because of RNG, but they're few and far between.
Will probably drop battle healer glyph once we get a mistweaver in, because the healer aggro i'm doing to the bats is annoying.