User blog comment:Ash9876/Standard Magic and Lost Magic. Pros and Cons/@comment-25512707-20150908221445

I agree Ash. I will admit that the slayer, any slayer, has definite badass abilities, but like you said they're almost completely combat orientated. The difference is simply this and what it all comes down to; how you write, and subsequently, how you have your character preform their actions and what kind of ingenuity that the character (author) does with a non-slayer magic user. If the character has a great enough battle sense or intellect they should be able to use their magic's in highly ingenious, and highly adaptable ways, unlike a slayer who's simply stuck using the same bag of tricks.

For example, a character could have ten different elemental magic's, and as such has ten (nine ways if the slayers element is on their list of elements) different ways of countering a slayer giving them a high level of versatility. But these are simply my opinions as thoughts.