Babcock doesn't run top 6/bottom 6, per se, but he does like offensive AB/defensive AB, with matchup expectations of Offensive A and scoring expectations of defensive A. Largely because he didn't trust the regular season centres for both B lines, they were the most heavily sheltered.
Last year:
Offensive A: Hyman - Matthews - Nylander
Offensive B: JvR - Bozak - Marner/Brown
Defensive A: Marleau - Kadri - Marner/Komarov
Defensive B: Komarov/Johnsson - Plekanec/Moore - Kapanen