Hi Nick,
Thank you for your interest in Syncfusion products.
We regret for the delay in responding. Please refer to the sample linked below for an example of using two different series in a chart. Ex. column and line.
http://websamples.syncfusion.com/samples/Chart.Windows/F72295/chartmultipleaxesseries.zipPlease let me know if you have any questions.
Thanks,
Vinoth