You guys have it all wrong. They have a third line center, what they don’t have is a second line center.
They have an outstanding top line, and a sprinkling of cheap wingers for the middle 6 (Bjork, Heinen, Debrusk, Donato, Cehlarik).
They have an outstanding top pairing, and a few movable commodities in the bottom 4 (Krug, Gryz, Carlo, K. Miller).
They have some strong but not can't touch prospects who could easily have productive careers in Boston, but who might serve the chase for a cup best as part of a trade package (Frederic, JFK, Senyshyn, Zboril, Fitzgerald, Lauzon).
Ideally they'd make a few strong trades to fill that 2nd line center role and middle pairing, to come away like this:
Marchand-Bergeron-Pastrnak
DeBrusk-____-Donato
Heinen-Krejci-Bjork
Acciari-Kuraly-Backes
Chara-McAvoy
___-____
Gryz-Carlo/K.Miller
But then I'm reminded that their pro scouting/acquisition has sucked, and I'm not encouraged by the trades they'll make, so maybe the best hope is to let the young kids continue to develop into the lineup.