Not Updated For Current Season
The masteries shown here are not yet updated for the current season, the guide author needs to set up the new masteries. As such, they will be different than the masteries you see in-game.
Priority: CAWCAWCAW (R) > Drain (W) > Dark Wind (E) > Terrify (Q)
Focused around maximizing survivability and utility, since Fiddle's AP ratios are ****. This build makes him an awesome early-game ganker, transitioning into a more utility-based role later in the game. He isn't really a carry, he just makes it easier for the rest of your team to do well. This is only my second build (my first non-terrible one), so please leave suggestions, comments, etc. Thanks for reading, and good luck!