This build was only meant for a well-rounded AD Jayce; Meaning that he is not fully offensive nor fully defensive but rather in between. I will be adding more info later but at the mean time, this should cover some basics.

Pros:

-Good sustain, damage, and speed
-Like many other builds: can lane top or bot (maybe mid)
-With this build: has the off-tank like feeling
-Has many different types of combos
-Decent escape skill that can also help others escape
-Both Range & Melee (of course)
-So-So Survival Rate (relies on speed)
-Can save allies
-Good Support
-Fast and helpful 4th skill/Ult

Cons:

-Compared to AD carries, Lacks damage output
-Shock Blast can be hard to use
-With This Build: (defensive and offensive is not the best)
-4th Skill/Ult damage is not the best
-Not the best 1v1 champ

Good

Since most of your skills boost your speed, I suggest you use this so you can escape from terrain that blocks your way.

Good Skill. Take it if you want a safe kill.

This skill for this champ feels like an option. I would say get this skill if your team lacks one. Still, it's a great option to choose.

Bad

Skill recommended for support champs only

Too long cool down. This skill will feel like an defensive skill and it will let you down most of the time.

Even though some people say this champ loses mana quick, I wouldn't recommend this skill due to his Lightning Field Passive.

Others:
The rest are Ok