It doesn't really need that much of hours to get a +9 armor... It only need luck.
I've seen ppl going from +4 to +9 on their spa.
But to be clear about this point lol.. I don't like the stat on armor either but 10% demi resist is still to much for a server which isn't P. A block damage on the armor or skill speed would be appreciated though.
Actually its hard to up it. Because the materials are rare to drop, and most of them cannot be dropped if you are 92, so you have to relay on buying or on farmers. And as the normal armors, above the +6 it requires the 3 pearls.
Demi resistance is the perfect bonus, because the one you listed are not good for both pvp and pvm. Block is good for pvm and for pvp warriors or sin, but useless against magic class type, skill speed is useless for lightining mage, since the cap is reached at 200.
Demi resistance works in both pvp and pvm because its a mix of resistance to skill and resistance to normal damage, and its also worth the effort of making this armor.
HP regeneration is useless, same as AC (AC can even be a double edge sword), all the ppl who believe this bonus helps in pvm they really dont know what they are talking about.
So the juice of this post is that your slaying a boss to get a useless item.