Create different test cycles for each team that contain multiple components in each test cycle.
Reorganize test cases by new features first?
Reviewing test cases when they are new: Test cases that haven't been reviewed should be in a QA status. QA person will review test case and decide if the test is a CoreRegression testing.
Every 2-3 sprints, review test cases that were tested or impacted by the most recent changes. Check test cases to ensure they are still valid and steps are correct.