Best way to practice a hero is simply to play them . Mei works best on control and defense , and can also work on attack if you ' re confident with her and good at timing your ult , so you can probably try her without fear on most maps . Your greatest strength is in 1 v 1 fights . Mei is rather weak when 2 or more people gang up on her , but she is an extremely punishing character in solo duels , which gives her her reputation for being annoying . Mei ' s kit lets her be very damaging to flankers , so try to be watching your team ' s vicinity for that Genji or Tracer . You also work as a decent flanker yourself if you can get behind the enemy team and take out their healers , that ' s good , and you can wall yourself for a safe getaway . You might already know this , but the best way to get eliminations is to freeze your enemy and then headshot them while they ' re immobile . Your alternate fire has no damage falloff , so can work at long range once you get used to the projectiles . Icicle away ! Also , your primary fire ' s ability to slow people is invaluable . While Mei has difficulty taking out tanks , slow them during teamfights to turn them into a big target dummy for your team . It ' s easier to hit slowed targets , so if you ' ve got your DPS teammates with you , it may be better to slow them than to attempt to icicle them . Ice block is pretty much your ' oh shit ! ' button . It grants brief invulnerability and heals you , so that ' s pretty simple . If you notice someone waiting by your block , ready to try and kill you when you come out such as a Widowmaker lining up a headshot or a Reinhardt ready to charge , very quickly put an ice wall between yourself and them when you emerge . It is not a good idea to ice block to escape a Junkrat , as he can place a trap and mine at your feet and kill you when you come out . Note that , like the ice wall , the ice block is a solid structure . Be careful not to block doorways or teammates . If ice wall is on cooldown , it also works as a budget ice wall ! Blizzard is best used when your team is about to engage the enemy . If they ' re too distracted to see it coming , it ' ll hit hard . It ' s extremely effective in choke points and enclosed spaces if you have nowhere to run , you ' re screwed . It ' s also a great tool in Overtime throw it onto the objective and everybody either scatters or becomes easy pickings . Ice wall is something you learn with practice . You are going to screw it up at first , it happens . Just apologize if it negatively impacts your team and keep going . Eventually you ' ll become quicker with the timing of it . Remember that if you screw up the placement , pressing E again will cancel it . Also , in case you weren ' t aware , while placing the wall , you can press E to rotate it . Now , the wall is probably the trickiest part of her kit . The mentality to have when placing it is not just that you are blocking enemy damage remember that you are also blocking your team ' s own damage , so don ' t be throwing it up at the enemy every given moment . Essentially , the wall is a tool that allows you to prevent both sides of the wall from engaging with each other . So you never want to use it when your team has an advantage if someone is ulting , leave the space open so that they can get your damage in ! If the enemy is ulting , on the other hand , and your team has no real countermeasures , then it ' s a good time to wall . So naturally , the simplest use of the wall is to block bad things . D . Va ult ? Wall it . High Noon ? Wall it . Reinhardt just Earthshattered your team and is preparing to charge ? Wall it . Graviton Surge ? Wall your whole team and save the day . You can counter so many ults by just sticking a wall in front of it until it ' s over . Another use is to separate enemies . You might see Meis using their wall to block the spawn at first , which isn ' t really helping . However , if Mei waits until 1 or 2 people emerge , and then uses her wall , that ' s good , because it ' s just turned 6 v 2 . You can use the wall to prevent the enemy from coming in as a team . This is an extremely valuable ability , because if you can fight the enemy one half at a time , you ' re pretty much guaranteed to win that team fight . It is always better to split the team than to completely block the team . You can also use it to prevent people from escaping you if a Mercy or Lucio lingers too long , trap them . If someone ' s trying to get away from your or an ally ' s ult , trap them . Nothing says dread like having your escape cut off and hearing the hiss of Mei ' s M 1 . The wall also functions as a movement ability use it under yourself to give yourself a vertical boost and cancel the wall after you ascend so you don ' t hinder your team . This allows you to reach high areas and more effectively take out snipers or find vantage points . You can also use it to get your entire team across gaps that some of the members may have been unable to cross by themselves , such as the Hanamura left flank . Lastly , when you freeze someone , always say hello before you headshot . This is the pro Mei strategy . Optionally , use the ' sorry ' voice line directly afterwards , for maximum bm .