First of all...get a watering system going. The tree will be in water stress, help it out.
After that...challenging.
I've done only a couple of fire jobs over the years. Take a wait n see stance if you can. If there are portions that you know are burnt and dead its time for amputation. If there are portions that might have a chance...put the saw away and let the tree tell you how much of the food factory got destroyed.
If this is an insurance claim you're likely going to get pushed by the adjuster to do some work and settle a claim for your client. That isn't proper arborculture, that's tree cutting. Get together with your client and tell the adjuster to cool their heels.