The better version of this is with shatter. You just nova shatter barrage, get frostbite, imp FB for r1 spam for more procs between barrage spam. Pom ffb instead of fireball to benefit off the frost talents. It's actually so good even in arena.
@@JayQx7 haha ya the one you linked in the comments made me do this reply thinking you didn't have shatter. It's very strong with a disc priest in 2s or a frost mage. Can shatter off his deeps etc
arenas is easy for casters as u can deal with two (and three) people. In BGs where u have people popping out to you from, literally, everywhere. Its very neat to not consider being cc'd :D