Firstly, as John rightly stated, he will not be deported, but removed in the worst case scenerio. With a removal, there is usually no ban on entry into the UK, he can enter almost immediately if he obtains an entry clearance, although an ECO might take Paragraph 320(19) into consideration when processing his application.
Paragraph 320(19) unfortunately supersedes
Paragraph 320(7C), therefore the fact that he is married or in a durable relationship with a brit or settled person, will not overrule that refusal.
I think you best option is to wait and see how things unfold. As things stand, the HO has not refused the application made, or notify him of any intention to proceed with removal action.
In anycase, he will have an AIT right of appeal on Human Rights ground, if they intend to proceed with removal.
In the meantime you could start working on raising a bail surety/recognisance and get him a bail once his prison sentence has been served, should the Secretary of State or a Chief Immigration Officer refuse to grant temporary release or bail.
Due to your ill health, i am sure there will be a Strong Article 8 case and if proportionality test is applied, it will be reasonable to say his action merit interferance with you family life, in the interest of maintaining law and order.
I will live that with the court.