If Evie uses her Ice Block to heal herself or to avoid damage, you can scatter Sticky Bombs around the Ice Block so you can hopefully kill her. Good reaction time is the key!
Salvo does insane damage to your shield. Wait for Drogoz to use his Salvo before pulling it out. If his team is not focusing you, you might save your shield if they decide to push.
Skye has the highest DPS in the game when at close quarters. Sometimes it's better to turn around and block her shots with your shield or Charge away. Judge from where the most damage is coming from.