[General Questions and Answers] pnutster:
After weeks of trying I finally got my Blu Advance 5 HD rooted! Ow yes! So good to have Airplay back on my android!

Needed tools are:

MTK Drivers

ADB

SP Flash Tool (Actually not used here, but useful in case you want to flash to stock boot etc.)

Blu Custom Recovery Image (blutwrp.img)

Magisk

Patience

Steps I took after making were as followed:

Ensure your phone has enable debugging on (info on how to do this you can on Google)

Ensure you have installed the MTK drivers to allow communication between your PC and phone

One of the first steps I needed to do was ensure the bootloader was unlocked, it appears there is a setting on the phone, but that was not enough. You need to use ADB in your command line (search for Android ADB and you'll get plenty of indo on how to get this up and rinning) and first get into bootloader mode:

adb reboot bootloader

, then use command

fastboot oem unlock

. Your phone will allow you to use volume up for unlock. THIS WILL ERASE ALL YOUR DATA!!!! YOUR SYSTEM WILL BE WIPED CLEAN AND THE PHONE WILL INITIATE AS IF YOU HAD IT DAY ONE!!!

Immediately after this I did not reboot the phone, but installed the Blue custom recovery image.

Ensure your blutwrp.img is in same folder as your ADB application. Then use

fastboot recovery blutwrp.img

Then use

fastboot reboot

Now the phone will reboot. I experienced that my phone got into a bootloop between TWRP custom recovery and trying to boot normally. I used my volume-up button and that forced to load the TWRP. I found more people ran into this issue and what they did was while in TWRP: Click Wipe > Click Advanced Wipe at bottom > selected Data > Repair or Change File System > Checked FAT (partition file system should be changed) > then do EXT4 (changes back again). After this I did not have a bootloop any longer. If that didn't work, do same for System partition

Now reboot should go fine and it will take a while for anything to show up. Remember the system was wiped by the oem unlock. So give it 5-10 minutes!!!

Once you have your system up and running again you can then start with installing Magisk: https://xdaforums.com/apps/magisk/official-magisk-v7-universal-systemless-t3473445 - follow instruction on site. I just connected my phone to PC while on and dragged the installers to SD drive. Then rebooted into TWRP and holding volume up. Once in TWRP, use install and find the Magisk installer and click it and follow instructions. (Don't install the magisk manager just yet!!!). Reboot after installation.

Once rebooted, use a File Manager app to browse to the Magisk Manager APK file and clicking it should install.

Now run Magisk Manager

The following could be different for anyone, but when running the manager and doing the SafetyNet check i ran into: ctsProfile: false Magisk

I got this fixed by using Magisk manager top left menu > Downloads > Scrol luntil you see "Universal SafetyNet Fix"

I checked again and got all green checkmarks.

After this, I didn't realize what had happened, but after weeks of trying, reinstalling stock system several times, I was rooted, root checker said so and proof in the pudding was installing my long lost AirAudio app I used for getting my Android device hooked up to AirPlay!

I hope this helps out those that are trying to root their Blu Advance 5 HD

Thanks mikele2016 and ramiabouzahra, your posts have lead me into the right direction!

TL;DR I was very much using blinders and just tried and tried with Flashing SuperSU and it just would not work and thought I'd give Magisk a try.

Thanks