This is THE best build I have used in-game because of all the damage and Jayce'sHYPER CHARGE.

If you want to dominate with Jayce, I would recommend that you'd follow this build.

For runes I would pick

Greater Mark of Alacrity,
Greater Quintessence of Strength,
Greater Glyph of Alacrity,and
Greater Seal of Resilienceto finish off this build.

These Masteries are extremely useful in the beginning of the game. (its basically what masteries are for)

They add the extra damage and life-steal for conquering your enemies.

For me, I'd start off withBoots of Speed, and 3 Health potions.

Then I rush for the Recurve bow then theWit's End.

After that, I start to farm with HYPER CHARGE toward Phage, Zeal, and Trinity Force.

I continue to make Gold then Buy a [http://images.wikia.com/leagueoflegends/images/6/62/The_Bloodthirster.gif] Bloodthirster and the 2 Infinity Edge's

Leveling LIGHTNING FIELD / HYPER CHARGE first is great for harassing in the beginning in the brush, and farming the last-hits.

Then on level 2, you level TO THE SKIES! / SHOCK BLAST.

Then you obviously level THUNDERING BLOW / ACCELERATION GATE then max out your
TO THE SKIES! / SHOCK BLAST, then your LIGHTNING FIELD / HYPER CHARGE.

(but you always level your MERCURY CANNON / MERCURY HAMMER when you can. ( 6-11-16))

I would go withFlash and Ignite.

Flash is for either getting away easy, or getting an easier kill when they are at low health.

And to finish off your enemy, or taking down they're HP faster, get Ignite.

Other options are

Teleport

Heal

Exhaust
and
Revive.

Just use your Hyper Charge to finish off minions faster or easily last hitting them.