Charming

4 - bardic/long range help

28 - advantage on disguises

52 - cutting words

76 - apply marks with successful charisma checks

100 - infectious bardic

120 - 1 minute short rest for party

Covert

4 - hide/disengage/dash

28 - climbing and swimming speed

52 - misdirect (as mastermind)

76 - evasion

100 - 2nd bonus action (only cunning action)

120 - 2 turns at beginning of combat