I think that's no possible, @Leeful PS-Phwoar! only works on 5.05.
On 6.72 you can use @Leeful PS-Phive!. It uses the same selfhost method, but I think GoldHen 2.3b2 has not been added.
Go to first page of this post: https://gbatemp.net/threads/release-ps-phwoar-exploit-host-menu-for-ps4-firmware-5-05.553359/post-8877798 and go to 'Install From a PC' section.
@Leeful I'm confused. Both 'Hen214.bin' and 'Hen213.bin' in your .zip are the same.
'Hen214.bin' for PS-Phwoar! v1.4 has the same md5 than 'Hen213.bin' for X-Project v1.5.7.
What is the correct, 'Hen214.bin' or 'Hen213.bin'?