Healing is so intense its hurting me

I refrain from healing unless I really need to because yes, M+ healing is really rough atm. People are getting hit by literally every single thing being sent out by enemies and the tank doesn’t know how to just STOP MOVING for 2 seconds to let me get mana. I did a +8 on my shaman while riding 10% mana the entire run xD even our dps were like bro let the healer drink but the tank kept going LOL