My Opinion on the 2nd PP unit. We don't have a net front presence and Stastny isn't the solution. So my proposal is either put Slavin in front of the net, good stick and hard to move, or Martinook.
Now to explain both.
Slavin - the 2nd PP unit usually comes out with less than a minute remaining and with both Slavin and Pesce on out there the transition between the end of the PP to a regular 5 man lineup doesn't need to be made. Also, as stated Slavin has a great stick and if he is in front of the net, aka Chara in Boston back in the day, he won't be easy to move.
IF not Slavin, then Martinook,
Martinook has no problem sticking his nose in front of the net, can tip pucks on the way in, but he can also get under the skin of the players around him with his trash talking. That could be just enough to get someone off their game long enough to get a better shot.
So 2nd line PP
Svech, Tevo, KoKo, Slavin
Pesce as QB or
Svech, Tevo, Koko, Martinook
Pesce as QB