Put Koivu with Kovalev and Pac, as Pleks is dragging that line down. Leave the kost/lang/kost line for now, since it was pretty good until the last couple games, and obviously leave the 3rd line in tact. Bench Plekanec!
s kost lang a kost
pac koivu kovalev
lats lapierre kosto
higgins begin dagostini
Put Koivu with Kovalev and Pac, as Pleks is dragging that line down.
Any line with Kovy and Pac will have a tough time defensively, unless Carbo makes sure they play the softest possible opposition. Which he won't be able to do on the road. Pac is too young to keep the puck at the right end of the ice against decent NHL'ers, and that has never been Kovy's specialty. Both of them need to be sheltered. Here's an idea, off the top of my head, for road games only:
Trying to keep Koivu's line away from tough opp. This is assuming that Carbo is dead set on going with three offensive lines. Otherwise, I'd put Begin in the lineup instead of Patches until Tanguay comes back.
Andrei Koivu D'agostini
Pacioretty Lang Kovalev(Like Pre-season)
Latendresse Lappiere Sergei(it'll get Sergei working and give them a guy who can put the puck in the net...potentially)
Higgins Plekanec Kostopoulos(two guys who will go to the corner for Girlanec)