Regarding your top drawing, if that middle splitter is a 3-way, your middle TV gets a 50% signal, the adjacent TVs get a 12% signal and the two outer TVs get a 6% signal. You want to split the 722 signal two ways and feed two more splitters and feed TVs from those splitters. Those four will then get a 25% signal each and may be OK. You can then try splitting one of the TVs to feed a fifth or then use the 3-way. If you are using a 3-way splitter, one tap is 50% and two others are 25% signal level. Those last two splitters cut the already weak the signal in half and are not needed.