How do you build Fiddle?
I picked up Fiddle not long ago after they announced the mages rework, and i've gotta admit, he's really fun!! I have no idea why i never even tried him once after playing for over two years.
My problem with him, (although it applies to other champions as well) is his lack of flexibility in his build. I just never ran into a case as worse as Fiddle. He has so many core items.
You need boots. Rylai to stick to your target. Zhonya to avoid getting stomped during teamfights. Rabadon because you NEED that AP otherwise your base damage sucks without it. And an item to help you manage your mana since his mana costs are so high, which is usualy Runic Echoes if you're playing jungle. His cooldowns are also huge, but i took 30% scaling CDR runes to make up for it.
That leaves with one spot open, but so many items that are desirable. Liandry is nice against health, Void staff against MR. Abyssal against AP. Even a Banshee could be interesting if they have can knockback your ult, and many others.
It just seems like if you skip one of his core item, it hurts his gameplay so bad compared to any other champions i've played. But i'm still relatively new to him so maybe you guys could help me out!
Magic Pen marks, Flat Armor Seals, Scaling CDR Glyphs, Flat AP Quints. You can run whatever masteries you want as long as you have a minimum of 12 points in Resolve to make use of Runic Armor and Summoner's Insight.
because ludens echo has 40 more AP and 3% more move speed and drop 
instead of 
may be a better start for fiddlesticks in the jungle as it will give you some extra hp for being so fragile and with you lacking AP early on with some mana regeneration as 
