I think the diction recordings are helping me to learn this faster. We have one more regular rehearsal next Tuesday, then two dress rehearsals on the 26th and 28th, followed by the performance on the 29th. A lot of the polish will happen in those last two rehearsals. And, of course, in our outside work - I need to run through with diction several more times, I think.
I'm taking note of the tricky diction bits (that is, those bits that go fast) that I will focus on. There are a number. But there are also bits that repeat a lot (some familiar from "St. John Chrysostom"), and those I mostly have a handle on.