Fire dps is inherently weak, and it is greatly affected by actual crit in combat. It's normal to be hurt by thousands of seconds.
The main reason for your dps countdown is that you are not familiar with the boss process. Post-energy is the first and also a small soft invalid dps.
When there is 3-point combustion, the higher the ignition damage, the better.
Please sort out your questions. The skill names are all wrong.