Just thought I will update you all, I have 2 Wii U's one is 5.2.1 and the other is 5.5.1. I just created my self-host on the Pi but instead of using a wired connection I have a USB dongle which creates a hotspot for the Wii U to connect to.
Using the Exploit from the AIO thread, both Wii U Freezes on the launch of the exploit.
I then used the exploits packaged with the HBL download and it works for 5.3.2 but not 5.5.1 (If the 5.5.1 exploits are hosted on my PC it works fine, just on the Pi it don't work.)
Will now try the static exploits and see what happens, but so far, only working with 5.3.2 and no luck with 5.5.1. Which seems strange as when hosted on my PC which is also wireless, so in theory it should work?