Vulgo,
ahhh the power of knowledge! It booted beautifully. Thank you! Then I installed a new version of Clover (via Clover configurator) and again, some ACPI problem apparently. Meaning, somehow Clover Configurator is messing up with my settings. I will do some further investigations on the differences between the config.plist file you sent me and the one Clover Configurator is generaing. For your information, what I did was simply open the good config.plist you sent me on Clover Configurator after it booted successfully, from within High Sierra, saw a bit of the options, then checked the update of Clover and installed the latest version. That was enough to mess up again.