Factory hinges can be skeletonized and made much lighter than stock. It can even be made undetectable when bolted in if that's your thing.
That's what I plan to do unless somebody comes up with aluminum. I don't care about being stealthy just want light and to work right. I also plan on opening them up a little and having the pins easily removable to pull the doors.. Race car stuff.. lol
These are aluminium hinges I made. Bolt up to factory holes on the body so you can adjust the door alignment. Also the rod end adds adjustment. Added bonus, doors lift off. I tried lightening the original steel hinges but wasn't satisfied at how heavy they still were