Well seems like the description item is wrong, i ask to a kRO active player (well to be honest was 3 players but still 2 of them dont answer me yet D:!) about Doram things and some he told me is the Charming Grass Necklace dont give -1 Sec cast time, the kRO effect is -1 sec delay-after cast, but even i try without that accessory, with 1 and with 2 but i dont see any change in Cast time (Fixed or Variable), Delay or CD, the only thing is working fine is in the damage bonus with full set...
So no reason to use 2 or even 1 if you dont need for increase damage.
