This is a Viability Ranking for the Grand Duel mode in Monster Legends. The monsters here are ranked based on popular opinion through the comments and polls, which is based on how well they perform in Grand Duels. The Classic Duels Viability Ranking can be found here.

OP Rank

These monsters are the best ones to choose in Grand Duels, and perform exceptionally in the Grand Duels meta.

OP+:

OP:

OP-:

SS Rank

These monsters are very good picks in Grand Duels, and only fall short of OP due to minor issues with stats, moves, or traits.

SS+:

SS:

SS-:

S Rank

These monsters are good choices to use in Grand Duels, but do have small flaws compared to the ones in the tiers above them.

S+:

S:

S-:

A Rank

These monsters perform fairly well in the Grand Duels metagame. You should choose these if higher tier monsters aren't available.

A+:

A:

A-:

B Rank

These monsters aren't ideal, but can still be good choices and can perform well in the Grand Duels metagame on certain occasions.

B+:

B:

B-:

C Rank

These monsters are below average in the Grand Duels metagame, and should only be chosen if there are no better choices available.

D Rank

These monsters perform poorly in the Grand Duels metagame, and you should try to avoid choosing them if you can.

E Rank

These monsters are very bad in Grand Duels, and should almost never be chosen, only over monsters in F rank.

F Rank

These monsters are the worst of the worst in Grand Duels, and should never be picked. They will help your team very little, if at all, compared to other monsters. 

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