I liked the proposal for *{.V'y} to match the pattern of the consonants. Then they could also be used as pro-sumti!
However, that's now outside the scope of the conversation.
Regarding the lerfu string stuff, I terminate my lerfu! I always terminate {li} whether it's necessary or not, and I always use {boi} if there are two unrelated adjacent strings. However, I don't recall having to use that many times because it rarely comes up.
However, I have a giant boner for fa'orma'o in general, and I tend to -over- use them if anything...