In my own experience I ended up running the same test e cycle again for my 2nd cycle, I went for 12 weeks instead of 8 weeks, as I felt that I was seeing the most results after week 6, the things I did different was adjust diet and training to maximize my gains beyond that of the first cycle.
Just my opinion on things, instead of just looking to add more compounds, if you think there is nothing really to improve on training, diet wise during your next cycle, you could try upping the test to 600mg or maybe add in something like deca or EQ at 300-400mg a week.