Gintamaaaa

It is almost similar to the Benizakura arc to be honest so if you have watched it you might be able to get by. 

The official subs I watched it on wasnt really able to encapsulate what Gintama is about. 

Like Ketsu no Ana was not translated into asshole etc. 

I suspect to get quality subs you will have to wait even even longer. because of the complexity if they really wanted to do a good job.