I'm picking back up the Sword of Truth books and I recall that Richard Rahl as a war wizard was able to do all sorts of magic by instinct when the need arose.
However, I don't recall if there was ever a real defined concept of what sort of powers and spells (using the term loosely, as they are done by instinct) could be used. He used healing magic a few times and he seemed to be able to enhance his archery skills. He also found a book he needed in a giant library and did some other minor stuff.
But could Richard use Wizard's Fire or cast a web to hide something? Essentially, I'm wondering if he could theoretically cast any power or spell that another wizard could or if there was a group of powers he tended to be limited to.