Do any of you perform with Launchpad/Push/APC/Midi Fighter?

Not the ones you mentioned, but I am using a reloop Neon as it compliments my setup very nicely.
Especially Serato Flip is awesome if you get the hang of it.
How often you do things is totally dependent on the crowd. You need to read the crowd.
Some crowds often want to just listen to songs and you should only do things very subtle (often in bars or lounges) and sometimes people go crazy if you do a lot (like on most festivals).

Laptops:
Other than having a good one that wont overheat and possibly a Mac. Nothing special.

Turntables:
Yes loads. Needles, heads, slipmats, motor tuning,…. you name it. If you are not an expert do not use.

CDJ:
Yes a relic from the past that I put aside to make room for my controller(s)

People at that level are hugely personal in their setups.
So to get to that level the wrong way would be: Buy his gear and think you can pull it off.

The right way to go about this is:
Get to know your current gear.
Train until you can do crazy stuff on your current gear.
Add something that you have a plan for and in your mind know how you want to use it.
Do that over and over until you hit the brick wall (which you will).
Think about why you hit that wall and what you can do to make it better.

When you reach the last point you will know so much about equipment and your own style and technique that you KNOW how you can fix problems. For example this guy fixed it by (I assume) deep knowledge in how to map and program stuff. Another example (van Dyke) fixed it adding stuff and using different tools mixing them together via a “hub” mixer,…
But there are endless possibilities and every top DJ that knows his own style and technique and level of understanding the gear will approach this differently.
I have DJed with many DJs at festivals and was “warm up” on big ones and saw big names and THERE IS NOT A SINGLE setup of one of those real cool guys that is the same as the next one.