A friend on maple and I got into a really good discussion what ZHelms for HP washing classes should be scrolled for.
ZHelms should be scrolled for INT first. After you get HP to a suitable level, then ditch the ZHelm and get one scrolled for your primary stat. As it is, the HP washing player will want to acquire an immense amount of MP, and an extra 2 MP/level (3 if you're lucky) is a large gain that's too hard to ignore.
But what is a "suitable level"? Couldn't "Pink Bean 2" come out someday and set a new standard for HP? Furthermore, sacrificing DEX on a helm for warriors or hermits is a huge loss. That extra 15 DEX from scrolling could mean the difference between wearing Casters and wearing Mambas. I'll concede in saying that lukless hermits that wash might benefit from INT scrolling since that extra 15 LUK isn't so useful, but to a low-DEX one that extra DEX makes all the difference.