How can you have an existential orientation and at the same time incorporate techniques from other therapy models?

Incorporating Other Techniques Existential Therapy
Existential therapy provides a philosophy and a framework for psychotherapy, but few techniques.
How can you have an existential orientation and at the same time incorporate techniques from other therapy models?

Corey, G.. Theory and Practice of Counseling and Psychotherapy, Enhanced (10th ed.). Cengage.