Yuumi will look to poke you down with her ability so she can poke you down. When she uses her , try to dodge it by walking inside the minion wave.
At level 6, take deliberate care about over extended without vision. She can easily set up a gank with her and pick up a double kill.
Try to harass Yuumi when she leaves her anchor. If you can poke her down, she will have to waste her mana healing herself and not the AD.
Yuumi’s has quite a big area of effect. Do not look to team fight if her is up inside the jungle or around an objective as she will be able to root multiple members of your team. Try to fight her in open areas where your team is not grouped to closely.
Yuumi’s play style allows her to jump onto any member of her team if they’re nearby. If the enemy looks to be engaging, back off as soon as they play aggressively especially if Yuumi is attached to the frontline as she will use her aggressively to start the team fight.
If Yuumi is in a bad position, try to kill her. She has no mobility without her allies nearby and therefore can be punished very quickly.
Yuumi’s first power spike is when she gets Athenes as it increases her healing and damage output. Do not get hit by her as it will deal a lot of damage to you.
Yuumi’s secondary power spike is when she reaches level 6 as she can easily start skirmishes with her . Try not to get caught out by her engage when she is level 6.
Yuumi is really good in team fights thanks to her AOE . Try not to clump together and do not- under any circumstances, fight inside the jungle.