Your build has a limited kamihime in it, which means it'll only work for whales.
Thunder players relying on Baal have to play very quickly to avoid their key debuff falling off in long battles. In general, you have to play in 7-8T cycles, and 1-2T per cycle may be auto-attacks at highly reduced damage. And since you're probably not running Mordred, if Baal's debuff misses then there's a good chance your DEF debuff will also miss, and then your damage collapses. It goes along with the Thunder theme of high risk / high reward, which is generally sub-optimal for farming (where reliability is preferred; you don't want to spend limited resources on a defeat).
I'm holding off on incorporating kamihime introduced August 2017 or later on DMM into my builds because I want to see how Nutaku handles the 2nd Miracle ticket. That'll give some insight into where the cutoffs will be for later Miracle tickets, which is important for build planning.