No. I have no way of knowing the types of gems you use (besides the colors) nor their conditions of activation. Even if I did know them, to be able to strategize around that is too much.
If I am going to use 2 meters to do a combo that brings in one one of my characters that is about to die to finish you off, and then you live because of gems, that is not fair. You could easily make a comeback just for having a random gem completely unrelated to your skill.
Don’t know why people think that is fair to be forced to play with such an unknown and unnecessary factor. It has been too often that I should have won a match only to have the opponent randomly appear with 2 more meters, or to randomly survive my final attack.
Being able to calculate what you have to do to kill someone is very important in fighting games. To have that randomly change because of gems is not fair. Gems allow crazy things to occur in matches that should never happen. Fundamentals should be what wins a match, NOT random factor gems.
Now if two people agree to having that disadvantage and to both use gems, then they have agreed to that. I should not be forced to agree to play against that disadvantage.
Also I understand how gems can be fun, and online there is nothing at stake losing to players with gems. But in a competitive scene where it should be the player’s skill that wins, gems should not be the default.