what are the must have apps for rooted phones in 2016?

Im going to root my lg g4 today on 6.0 v20d ... My question is .. What are the apps that every root user should have in your opinion and why?

it must be impossible. please help if unbricking this g928t edge plus is possible.

i flashed twrp recovery and rooted phone with cf-autoroot multiple times because of the dm-verity verification failing and causing FRP lock to brick my phone. i have always just flashed stock firmware and it has always fixed the issue until now. now that wont even work and i feel like ive tried everything possible. can anyone please please help me out. ive been without a phone for 2 days and it is my only phone to use. please help.

Can I re-lock bootloader (or is it needed)? Must send out for warranty.

The camera module's pooched (started failing in 5.1 with not being able to focus on near objects, now it won't run at all). Weird shenanigans in 5.1 as opposed to the stock 4.3 that it came from. In 4.3, I can run Flashlight, but Gallery crashes when Camera is run. Front camera works intermittent - rear camera not at all. In 5.1, I cannot run either the camera app or Flashlight (quick access menu) and if Flashlight is pressed, the LED will shine for 5 seconds, turn off, and the Flashlight icon will stay half-lit until the phone is soft-reset. 5.1 gives the notification "cannot start the camera - make sure 3rd party apps (such as Flashlight) aren't running" (with everything disabled).

The only constant is that the rear camera will not function in either Android environment.

It's still under warranty with Wind, do I even need to worry about the unlocked bootloader or no? Either of these were stock Android with no root.