Good questions. I got a thinker here. I like that!
First, I introduced that upping the dosing strategy when I got back here from being banned for a long time. Upping the dose should occur when a person thinks adaption occurs, which would more and likely be around the 4 week point. Second, upping EQ (the same hormone) for the second half of a 16 week cycle would make absolutely no significance in their LBM gains. The only thing that would work to extend a cycle a couple weeks to obtain more LBM would be to insert a more "anabolic" compound like tren, and that would only give a person a couple weeks extension. Upping the dose on the same compound would not make a difference at all, that cycle stalls at week 8.
Second, yes, when the cycle starts to baseline again at the 20 week mark another 8 week cycle would be ideal. It would stay baseline from there on out unless you up the doses again.