After living with having a tire on a swing out of a Kaymar bumper, on an 80 series that was a daily driver, for about 9 years, I've been real hesitant about putting a tire carrier on the back of either of our current 100 series. It is much better than the factory location when you're offroad or if you have a flat tire, but it can really become a pain in the ass getting stuff in and out of the rear hatch on a DD. As far as additional "protection", maybe, but i've also seen it act as a damage multiplier in an accident.
I like some of the interior tire carriers that I have seen for the 80 series, but I don't think I'd be willing to give up the cargo space.
A LR Defender style, hood mounted spare probably isn't going to work too well.
With the size and weight, I don't think I'd want to have a spare on the roof on a DD. Maybe if I had to have a 2nd spare on a long trip, this might be an option. The extra weight up high affecting handling, additional height clearance issues, and just being a pain lifting and dropping the tire would steer me away from this option.
So at the present time, the spare tire on both of our 100 series are still in the factory location. It's vulnerable off road, can be a pain in the ass if you have a flat, but it has the least impact on a daily driver. My second choice would be on a rear bumper swing out, and we will probably be doing that on my son's TLC at some point in the future.