sorry for the late reply...
Well let me see. Catalyst is really no need for me, as I offten go for blue myself, so I have plenty of manna. When the jungler needs it, well you just buy some potions early game and you will get trough it...
About the mejai's... It's amazing when you are going hard (low elo...) I already told in my build that it's optional, depending on the situation you're in... And about the Q... What is the use of a long terrify if you don't have any damage to do. Late game you need it in the teamfights, but when you are alone in a lane, you really have no use of it

+1+1+1+1 a thousand times +1. Not only for the name, but also because the guide is concise, informative, and very good.

You don't need Mejai's. Fiddle doesn't need to snowball any more than he already does. Rushing that early Catalyst into a Rod will be MUCH stronger and more consistent. I also recommend you max Q sooner because that 3 second fear is incredibly powerful.

pretty basic guide but seems stable.
also i really like the name so good job +1

+1 for the name

great build!! Really like the way you balance your fiddle, he is so op like this!!!