Puzzles is incredibly simple this time. Although they do introduce a new mechanic, they make you split your teams into two at the start. With the Max amount of characters between two teams at 6 (will be increased to 8 later)
although, it does split your team into 2 teams with max of 6, don’t split your teams evenly. Team 01 will be the team that will do the most fighting, put 5 of your stronger units there. Team 02 will have 1 unit, any 1 strong b3 attacker will do as mobs are rather weak in this side of the map. Other than that, it is pretty much a free clear regarding the puzzle aspect.