Regice has 20000 HP and 0.8 CPM. It doesn't hit hard at all because the tanks we have this time is too OP. However, it is like a wall that never crack. Even if Max Guard is almost never used, it still cannot be beaten without Max Mushroom.
Given it is Cloudy, Gigantamax Machamp might seems to be a better choice. But it cannot charge Max Meter, so you would need to place a Crowned Shield Zamazenta/Crowned Sword Zacian anyway. Having 1 less Dynamax Lugia would cost an extra Max Phase to refill Max Guard for 2nd times. Which in turn made Gigantamax Machamp worse than simply using Crowned Sword Zacian, unless you would also use Dynamax Cannon Adventure Effect.
by Nikaidou_Shinku