Prince of Spires
Auror
What do you need the magic systems for? What is their role? What kind of project do you need them for?
In general in these kinds of situations I follow Sanderson's third law: Expand what you already have before you add something new.
An elemental magic system, if fully developed, made unique and fleshed out can be very interesting and intriguing. And it can be more than enough for any one world or story. Just look at Avatar:the last airbender or The wheel of time. Both use elemental magic exclusively in their own way. And it's fully integrated in their society. Which makes it feel more "real". Having five different and unrelated magic systems which are not as developed as a single well thought out magic system, won't make your world feel more magical. It will just make it feel like the author threw everything at the wall to see what sticks.
In general in these kinds of situations I follow Sanderson's third law: Expand what you already have before you add something new.
An elemental magic system, if fully developed, made unique and fleshed out can be very interesting and intriguing. And it can be more than enough for any one world or story. Just look at Avatar:the last airbender or The wheel of time. Both use elemental magic exclusively in their own way. And it's fully integrated in their society. Which makes it feel more "real". Having five different and unrelated magic systems which are not as developed as a single well thought out magic system, won't make your world feel more magical. It will just make it feel like the author threw everything at the wall to see what sticks.