Shower Waterproofing

This is my first of two showers that I'm retrofitting in our home and I want to make sure they're going to be water tight and last for years. Both bathrooms are on the main level with 3/4" plywood floors and a full basement. My plans were to do the following: Deck mud slope, durock cement boards on the walls with the liquid membrane sealer. I've never done anything to our home at this scale and I have many questions:

Is there such a thing as too much waterproofing? If I take the laticrete membrane and thin set it to the walls, then go over it with a liquid membrane, is that overkill? Is it necessary? Or can I just use the liquid membrane and seal the corners with the fabric tape?

For the base - do I lay down chickenwire and thin set first THEN the rubber membrane or does the membrane go down first, THEN the thin set and chicken wire? Is the chickenwire necessary? Is the rubber membrane necessary?

I saw a video where the installer used tar paper instead of the rubber membrane then did chickenwire and deck mud - is that old technology?

On the curb - I've never floated a curb before and I don't like the idea of Kerdi curb - it seems it would flex too much! So I'll need to float the curb BUT - if I were to take the rubber membrane and go over the curb to the outside of the shower, can I use liquid nail and glue the sides of the durock to the curb and clamp them down? I saw another video where the installer screwed the cement board down to the curb and then buttered the tops of them with thin set and sealed the whole thing with Laticrete Hydroban.

I know there's a lot of questions here but I'm having difficulties deciding which way to waterproof and give us the longevity we need out of these showers.

Thanks in advance!

Mark