Dear Rabbi Simon,
What is the bracha you can give to a Holocaust survivor?
Difficult to say as a general rule, as every case is different, including also the individual’s relationship with Judaism and religion as a whole. But I would think something along the lines of:
Your life is a testimony to the resilience of the human spirit and of the Jewish People, against all odds. May you continue to behold the triumph of survival over the forces of evil and hatred. You are an inspiration to the generation. Am Yisrael Chai.
Rabbi Rashi Simon