Make sure you have scamper available before using Moji's ultimate or else the enemy might escape after you transform them into a treat as without scamper its really hard to finish the treat especially if the enemy is constantly jumping.
In the ult stance where you're damage immune, you keep going on a trajectory until you land, Io can ult during this and send you flying to your death. She has just as much long range damage as you, and Luna can rush you.
Try to predict Lex's auto aim ability and deflect it! This should be able to take Lex down to a low amount of health. If you aren't able to counter ti it will all come down to who has better aim.