This depends on what you would like to get out of it. And how damaged the inside of the phone looked when you first opened it.
Salt water definitely complicates things. But it sounds like you made all the right calls.
If you want data off the phone, my first step would be to get it into a known good housing. Any of the components that went in water could be bad. If it’s still not working in a known good housing (including screen), then I would wager it’s something on the board. We could diagnose that as well, but it’s best to know it’s not a bad part first.
If what you want is s working phone, I am skeptical that it would be any sort of reliable after that long in water. It could very well end up being more expensive trying to replace everything than just getting a new phone. But I would start with a new [product|IF371-005|lightning dock assembly|new_window=true] if nothing else.