Since someone else said their bear took 1 and 4, possibly 2 and 4 would work unless it's dependent on a CD being up for 4 that was used at 1, but barkskin is the only thing I can think of and that's a short CD that I believe would be up for both...
Sounds like our best plan then is
1 DH
2 Bear
3 Prot warr
4 Bear
We also have hunters, does turtle work to prevent stacks? I'm guessing no