Potent weapon scrolls currently available?

Those +10 attack scrolls are most likely last anniversary's scrolls; they were 40% (or 30%?) success, with 50% chance to break on failure, and gave +10 weapon/magic attack and +3 all stats. The last scrolls to have been "best" were the Pinnacle ones, with 20% success, 100% chance to break on failure; these added one less attack than the anniversary scrolls. The scroll trace system is decent for scrolling level 140+ weapons, but future event scrolls would probably still be better, if the last few major patches have shown. I don't follow KMS updates, so I don't know if new scrolls were released.