That works, Hank can help against the shadow things because his power can be used to stun them and make them vulnerable to normal attacks so if we do need something for them to team up against that would also work. Where/how should they meet? Hank will be running around the palace trying to help whoever's not fighting, and he'll also be in and out of the rift, but he could conceivably end up anywhere if she'll be doing anything elsewhere