If you use the "Heroism" talent, you can use Combat Slide to protect yourself from Skye's ultimate by timing it with the blast.

Don't use the Solar Blessing talent when fighting Willo! She can simply place her Dead Zone on top of where your Pyre Strike stops and completely negate the healing.

Most of your abilities (including your ultimate) have long and noticeable startup times. Torvald's Nullify will interrupt those, so wait until he uses it or buy Resilience to reduce the downtime he can cause.

Try to avoid direct confrontation with Lian. She has a lot of burst damage, two abilities with auto-aim, and her ultimate is essentially an automatic win button for her. Engage with your teammates.