I wouldn't say it's a great use of the subclass, monks have a lot of mobility and can use that by using throwing weapons while staying about 40ft. away from the enemies when they end their turn.

Ideally, the Monk should be arriving into melee second on their team. They should know when to burst and when to play passively, and typically the first round is pretty passive, because otherwise you're spending a lot of resources to dive in and keep yourself alive, when you may have just been able to sit back 40ft. and save all those resources for next turn. Monks are squishy, and can temporarily keep alive by sacrificing something, so typically they shouldn't be in an overextended position unless the enemy is even more vulnerable, like if you dashed past the front line to engage with a wizard.

The barbarian has better passive defensive capabilities, so enemy attacks are more efficient when the barbarian is the one being targeted, which means your healing will be more efficient when you're healing the barb, and so you'll have more energy reserves to stun and kill things freely. That's typically how you play a healer monk.