Welcome to my guide and it's my first too! So I play Jayce as an AD carry and I think it's as op for Top Jayce. Before I get to the rest of the chapters I would recommend having good positioning, common sense, and knowing how to CS.

So I was playing a game with Jayce as ADC and I was wondering to my self what if I get Ravenous Hydra and Runaans Hurricane? So I did it anyways and being completely amazed they both worked. But obviously if you want Ravenous to work you need to be in melee form and for Runaans you need to be in your Ranged form. You msut be thinking well why can't I just get one of them instead of both? Well it's simple you can demolish creeps in 2 seconds flat and with the enchantment Captain you'll be breezing through their lanes and back dooring like a boss.

Well since this is my first time making a build on Moba I'm not sure if the skill order is correct but basically you just max Q -> W -> E and obviously always pick up your ultimate when you have the chance too.

I personally like the Flash, Ignite combo as an ADC and since Jayce is somewhat beefy even as an ADC i think it's not necessary to get Cleanse plus you got that GA (Guardians Angel).

Pros: OP , OP, OP, Somewhat Tanky, "Tons of Damage", more OP
Cons: I don't see any unless you have a ****py team and your outzoned.

Just get all the creeps if you can I mean your the ADC.