Hi
If you have both Nexus and your wan routers in the same eigrp, that's fine you don't need hsrp for wan.
I bet your wan is advertising the default route. If you wanted to use hsrp, that means you have one link as primary and the second one is taking over when first goes down, am i right?
If yes, you just need to be sure that routes advertised by first wan will be preferred over the second link.
Thanks
Francesco
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