As @Zathrus said, I tested the theory & it is categorically NOT worth while…
If you join an alliance which hits 9* titans plus you are wayyyyyyy better off.
Cliff-Notes here:
Full Assessment: Loot Assessment - War Shuffle vs. Established Alliance, Which is Better?
Also worth noting that given the MASSIVE disparity I would say that even hitting smaller titans 7*+ CONSISTENTLY is WAYY better than the war shuffle…