I'm not gonna bore you with a pointless YouTube video
So lets get started, I'm currently stuck at upgrading the Fire Staff
After solving each puzzle in the crazy room, you can then upgrade your weapon.

Ice
You need to find 3 tombstones that look like they have water pouring
Shoot it with your staff then shoot with your gun to break it
- 1 near juggernaut (Behind it where the foot print is)
- 1 near the 2nd tank stop point
- 1 at PaP (close to the musical rock)

Lightning
You need to change the panel knobs to the point where they are not sparking, I believe there are 8-9 around the map
Everytime you turn off a knob that is flickering, another one will begin to flicker, eventually you will turn them all of and Samantha will say something

Wind (wasnt around for this)
You need to shoot these black smoking orbs around the map

After you do each one, you have to go to the excavation site and you will notice a glowing orb, based on the color you have to shoot it then change the panels so they all match up

You then go to the crazy place and place your staff to where you first picked up the rock, kill zombies around your staff and eventually you will see a glowing red outline around the staff in your inventory

So far we are stuck lighting up 935 at church