They aren't talking about the best way to boost your health and still be useful for anything. This is just how you get the max hp possible for a laugh.
If you're talking about actual PvE, I'd recommend having about 500hp, give or take. Usually I advocate high hp, but the mob AI is designed to target players will low health. Having really high hp will make it harder to hold aggro. My monk rarely gets aggro, even if I'm standing toward the front of the group, largely due to the fact that I have 640hp.
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