Assuming you have bermudagrass growing in the spring and summer. Tetraploid perennial ryegrass can be planted along with some orchard grass. If you are indeed in Maricopa county, orchard grass won’t survive past the late spring. The forage ryegrasses are quick to establish and will be more productive than strait orchardgrass for the six months you are managing them. If you include forage tall fescue, make sure it does not contain the endophyte fungus (good for a lawn, bad for pasture). The tall fescue pasture grass will be sold and noted as “ ENDOPHYTE FREE” which means it has no endophyte.