The answer is yes or no.
YES:
You certainly could create an interface group in that scenario. You would still want create two data LIFs on the ifgrp. On the NetApp you would get load balancing along with MPIO for failover
NO:
You would just create a data LIF on each port and call it day. MPIO would send data to both LIFs.
In either case, I would en up with 4 paths to my LUNs (two active/optimized and two active/unoptimized)