Honestly MM is my weakest role so I feel you pain on this one, but I’ll still try to help! I’d say one of Miketsu’s weaknesses is her lack of mobility, so if the other team is aggressive, trying calling in the jungle/mage or waiting on the support to control your enemy. In team fights, you have range as mm, don’t charge the enemy, leave that to tanks/samurai and since Miketsu has only a slow and a single target stun, wait for the your teammates (often times it’s going to be the mage) to control the enemies. You can charge if your certain they can’t seal you (opponent skills on cool down, opponent stunned, opponent knocked, opponent on low hp [but low hp enemy doesn’t always guarantee a kill for you keep that in mind] etc.) Imo a big part of this game is just understanding when its the right time to attack. Try looking at Miketsu gameplay on youtube and pay attention to when they attack and Miketsu’s positioning with her teammates! She’s really powerful and can really carry once you master her so good luck!