I had planned to begin teaching the Pastoral Epistles to my Sunday School class about 8 months ago.
That study got delayed and I am just now beginning to do that.
I had stumbled on to a resource that is in all the Logos base packages that I will be using as the basis for my class: Parallel Passages in the Pastoral Epistles. This was produced by Rick Brannan of the Logos staff.
It is formated like a Harmony of the Gospels, following 1 Timothy as the primariy work. He has arranged the parallel passages from 2 Tim and Titus. He has added headings for each section and brief observations about that section.
I am in the process of further customizing it for my class presentation by highlighting key terms that occur through the PE.
Following this arrangement will be easier and faster than going through teaching each letter as a separate book.