was there a scroll better than 20%'s?

"You can also buy new Aswan scrolls from another salesman for Conquerer’s Coins. These scrolls are special in that they give higher stats but use up more than one upgrade slot. For example, the one in the picture is a 60% Aswan One-handed Weapon Attack Scroll, which gives 4 attack but uses up 2 slots."
Source.

Well, if the lower % ones are +12 att, it still won't make them better than the 20% pink scrolls that give +7 att...2 slots would only be +6 att per slot...unless they give +str/int/dex/luk stats too?