Mostly everyone who plays Fiddle knows that his AP ratio is horrible.. I myself have never tried your build, but having TONS of AP is going to help your Drain alot, but you really want alot more MP then anything else with fiddle.. Plus I level Drain/Fear first, and get the "bouncer" last. Just an opinion though.

Rod of Ages?

Zeecron
its not 15% CDR, its 15% summoner skills (ignite, ghost, flash and so on) reduction.
But i agree that Ignite buff vs presense of the master, i woild go for that summoner spell reduction.

Issues with your build (my opinion, please don't get butthurt)

The mana per level runes are a waste. Fiddle has very little mana issues if you have half the idea of what you are doing. They add up to only give 10.5 AP at level 18 via your Archangel Staff.

You should definitely build Sorc Shoes/Rylai's before you build your Archangel Staff. Movement speed with Fiddle's ult is important, as well as Magic Penetration. Rylai's provides superb team utility with the ability to snare everyone constantly with your ultimate and bouncing bird.

From past experience with High ELO Fiddlesticks players, Drain is much more important than Dark Wind for first spell. Why? Drain allows you to heal yourself up during first blood attempt in your lane and allow you to recover health from being harassed early game (eating tank minions is great).

As for masteries, you are sacrificing 15% CDR (21-point mastery) for 10AP from your Ignite when it is on CD. You should really consider changing talents ASAP, you are losing something to big for something very small.

Maybe coz it got boosted lately with the speed of projectile... a bit nerfed with number of jumps tho...
I still get 2 points in it in later early or in mid game. than max out the drain+fear.
Its good silence and harraser skill. also can be used at last to killsteal :)

1 thing i don't like in this build. Why now every Fiddlesticks upgrade Dark Wind first? When i start playing with Fiddle i upgraded drain+ terrify and i got many triple kills ;]

i have no idea Alahric...

/wink

?_? That is very interesting comment about Certified Deadly's fiddle build indeed.

@ Certified Deadly.

yay i helped? :) not intended at all!

Dewo, your a ****.

Ye i've read it, but "this item can be really useful to buy earlier in the game" did still make me think that if you are doing good you are getting it late witch has no sense even more. If you are doing good that means game is near end at that moment that is why i asked why RoA so late.
If its just an optional item that you buy early (in bad scenarios) than i fully agree if you are buying it in late game than its a wasted cash.

who is Demo you are all talking about? :> demonstration version of me or sth? :P

@ build, a suggestion, taking Rylai before ring would be considered more valuable, since you are very vurneable to ganks, this would let you survive the initial gank to fear and drain away, also probably at this point you wont be over 200AP so ring passive wont be that big upgreade.
About last item, taking Rod of Ages as last item? at this point you wont have time to stack it up, a cheaper and better item for late game like this would be void staff. Ofc you will miss the mana/health but you have Rylai already for hp and mana is not a problem in late game isnt it? Void will give you even more M-pen that is realy nice for late game when ppl have some MR already and scepter is not enaugh. It also gives you instantly 70AP without any stacking.

hope this will "help" and i wont be mocked about this...