Just trying to see what magic systems are out there, what people would recommend and why.
Agreed. Further, it has some unforeseen positive consequences. Wizards become scholars (Experts) who actually know everything, like Gandalf or Merlin. Wizards may have access to great magics, but they only use them when in dire need, fitting the genre. Powerful wizards often go mad, explaining why we might have magical labyrinths full of traps, extraplanar creatures, and great treasure.You can never go wrong with CoC. It makes magical a risk and brings in the element of uncertainity.