Rarely hunted HGs in classic era, but (much) later in LoY era Rharzar certainly pathed pretty much as he does here, and I never heard anybody mention things being different. The main difference on live was the frequent server resets, I don't ever remember him being up after reset, while here server resets are rare so he doesn't get despawned. Even so, the trick is to not kill the drake that is his PH when he's not up.
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