I just finished writing possibly the most complex chapter I've ever tackled. The characters, motivations, logistics, and settings had me buffaloed for literal months as I slowly resolved problem after problem. But I think I finally have it tucked away and I think it will serve as the denouement, if not the literal climax, for the younger Seneca timeline.
My next chapter for the older Seneca feels as if it might do the same, but that would likely mean a somewhat shorter book than I'd intended. I'd been thinking something north of 120K words, but I'm only at 109K and things are moving faster than I expected. Quien sabe?