Prove Thyself does not stack with other instances of itself. May be unlocked in the Shrine of Secrets or in Dwight's Bloodweb at Level 35.

Does resilience and prove thyself work together?

Prove Thyself and Resilience will speed up the process of repairing. You will be able to use Resilience AND This Is Not Happening any time with the help of No Mither. In other words, you will always have a 9% speed boost for everything, as well as 30% bigger great skill check zones.

How long does it take to do a Gen with prove thyself?

If four Survivors work on a Generator while using the Perk Prove Thyself (Teachable Perk of Dwight Fairfield), it only takes 25.08 seconds to fully repair the Generator. If only three Survivors work on it, it takes slightly longer, about 29.3 seconds in total.