No. There shouldn't be a line with any of those three or Plotnikov. Kunitz, Dupuis and Fehr will need to be spread out so not all the poor skaters are all on one line.
If they're committed to letting everyone earn their spot and playing the bottom six pretty evenly, I'd go with Kunitz-Bonino-Bennett and Sundqvist-Fehr-Dupuis. Assuming Plotnikov is outplaying Kunitz, of course.
Kunitz could complement Beau well in a lesser role. And Sundqvist can get experience in more of a shutdown role. He can slide to center if Fehr gets hurt and/or before he's back without disrupting the other lines too much.