If you don’t have extra points to hold the days, then you have to waitlist all of them to replace the LV.
Now if you do, book what You can, waitlist the one day and have it replace the entire LV room.
Once you have all days, you can have Ms combine.
If you are willing to split stay, shorten the 4 day to 2 and book SV for first two nights and keep LV for last two. Then you can waitlist the last two and stalk!!