Custom Graph - Allow Aggregate and instances in same graph

REQUEST:  Please add the ability to create a custom graph with BOTH discrete instances (Top 10 or Show All) AND Aggregate entries in the same graph.

USE CASE: We monitor very large NetApp aggregates and we need the ability to see IOPs and latency monitoring (which are only available at the volume level, which I can tie back to an aggregate).  I want/need to be able to view both the aggregate-sum and the (top-10 or Show All) instances to determine relative impact of those instances on the overall performance of the aggregate and I have too many to aggregates to manage to be able to create 2 custom graphs for each..