I was running a build like this for awhile and I loved the utility it gives. Using a shield with it gave me four blasts I could use all on one field and with the bombs and elixir gun you have access to Water, Fire, Smoke and Light. The ability to suddenly combine Big Ol Bomb with supply crate and the elixir gun 4 is quite hefty for AE buffs.
Very good fight and excellent teamwork and communication.