I would also keep Panharmonicon. You have it in there for your commander's triggered ability only, but boy will it trigger! If you HAVE to make a cut, then you don't need it, but it could be so fun to pop off and create millions of tokens (or counters).
but how many creatures create tokens? From the Op’s fist iteration of the deck there wasn’t that many. Don”t need pan harmonicas being a dead card
It's more to do with triggering his commander. Provided the commander is on the board, anything that makes tokens will trigger the commander, which will trigger
Panharmonicon. Like I said, though, this card can be cut, it's not a must-have. However, if there is space in the deck, I'd keep it over some of the other cards.