If sage can multiply our bats then thats a great news and will surely go sage but if not what would get for rank 8?
warlock could be a good alternate (to help make use of wiz3), otherwise if u are looking for long term necro could be good (especially if u go all the way to C3).
That being said we still don’t know what rank 9-10 will bring so chances are you may want to take a R9 or R10 class if so then warlock is the safer bet since C1 and C2 offer nice rewards themselves.