Maybe I didn't understand your question:
A good substitute for dips, as recommended by CW, is decline bench. I don't recall if he recommends DB or BB for that.
If you barely made the last rep of the 10x3, you picked a good weight.Now, as I understood your question, you asked if you should use the 135 for 4x10. From your response, you won't be able to do that (nor would anyone expect you to).