I think running special dungeons outside of 2X drop is a waste of time... I just wait for that 2X and get the drop then.
Well my teams aren't strong enough for heroes/hera/zeus so my plan was to run expert whiskey for the 400 xp/stam ratio to rank up + moltdras since I have a lot of red monsters to level up. I've run the levels in Castle of Satan + in the Abyss about 7-8 times and I haven't even seen a mystic knight :/. Additionally, more whiskey runs means more chances at it dropping (x2 drop rate means I just run it twice as much for the same amount of chances right?
