play total mayhem;
primary fire for 1v1's
secondary fire for more than 1 person
bubble healers and tanks or anything taking damage,
call out your ults because you initiate the combo
Don't be face to face with the enemy,bubble somebody that is about to take a lot of damage or scaping from an ult,is important to communicate with the team for your ult
Try to space out your bubbles so your charge doesn't have plenty of time to significantly drop. And try to always make sure you coordinate your ult with others. Ideally, with a headset if you're on console.