I'm thinking your top 6 are (in no particular order) Arcuri, Pinelli, Mesar, Rehkopf, Martin (when he returns), and Valade. Sop has been playing well, and maybe he gets elevated to 2nd line depending on any of the top 6 struggling. However, perhaps likely he centers Zidlicky and Swick on the 3rd.
My question is what happens when Martin returns, and even before that?.....
Fishman (03), Pugliese (04), Misaljevic (04), Mercer (05), Morey (05), Bottineau (06).
Obviously Bottineau is one safe bet to remain on the squad. A couple of the other guys have been just plain unexpectedly struggling - baffling.