Questions about Rear suspension - Icon Mid kit

Hi,

I have a 2018 Tundra that has the Icon full kit front and rear - I bought the truck with it already installed so I am not sure what stage it is other than i think its either 7 or 9.

It has the 2.5 CDC's front and rear, tubular upper arms in the front. And i dont know if the rear leaf's are stock with an expansion or replacement leafs.

That said, I really am mostly happy with how the truck performs. It really does great except in the bigger stuff.

The front is as I got it but i have added spindle gussets and alignment tabs.

I do think the rear needs more attention than the front. We do quite a bit of slower trail riding in the truck and I like to run it a little bit harder when things open up. I am starting to look into rear options, and am thinking to go with an underaxle spring (deavers) and a cage with either fox's or kings. I was looking at both the Dirt King and the Camburg setups.

Knowing what the front has, am i 'wasting' money doing the rear first? With what the front has, is it even worth doing the back now or maybe going to something else in the rear vs a full on cage setup.

eventually some day i want to LT the front but like i said for what we do im very happy with the front. Its the rear that sucks.

Last question, how can i tell if my leafs are the 'RXV' or the add a leaf setup?

Thanks in advance
Steve