Training NMZ with Dharok's without flicking prayer

Whenever a conversation comes up about the fastest training method at NMZ its either use the 1 hp method with Dharok's while flicking prayer to maintain the 1 hp, or else don't bother with the Dharok's and use regular strength boosting gear.

Often people say using Dharok's is too intensive and would rather use the strength gear for better AFK, but why doesn't using Dharok's without flicking prayer ever come up? You could simply reset back to 1 hp every 3 minutes (after overload runs out) which means your hp would regenerate to 4 in this time frame. I am arguing that using Dharok's with this method is still better than any other. I do however recognise that keeping your hp at 1 is better, obviously, but if you don't want to have that more intensive training with flicks, I don't think that's enough to knock Dharok's out of the number 1 spot for xp/hr.

Thoughts?