All you have to do is heal the jungler on your side in teamfights. Your (A) and the Fountain of Renewal Can restore up to 65% of your teammate's HP if they are used together. Use crucible when you ult or when an enemy has a channeled ultimate and they used it on you or your teammates. Constantly heal!

Basically, try to hide from the enemies in teamfights for them to waste their stuns and silences then attack. If you find yourself weaker than the enemy you are facing, use one ability at a time. Hit, run, repeat. Make sure you use (A) and (B) before using your ultimate because you will have them again after you finish your long stun, delivering full damage.