Regarding avippaṭisāra, is the meaning of the phrase in bold below then something like: “When confusion (about tilakkhana/PS 4NT) is present, the condition for pamojja (joy) to arise is absent”?
“avippaṭisāre asati avippaṭisāravipannassa hatūpanisaṁ hoti pāmojjaṁ, pāmojje asati pāmojjavipannassa hatūpanisā hoti pīti …”