Complex sentence: The now-repentant Orleans decides to restore Montague's rightful estates to him; with his fortunes restored, Duboys and Longaville can be his retainers once again.
Split into simpler sentences: The now-repentant Orleans decides to restore Montague's rightful estates to him. With Montague's fortunes restored, Duboys and Longaville can be his retainers once again.