It's 15-14-1.
15 points in attack to grant damage from early and some base life steal to accelerate you.
This acceleration makes your Wriggle's Lantern use earlier in solo top (from long sword) and supply the lack of basic AD to Jayce.

14 in deffense in order to resist at early and supply too a bit lack of Defense in Jayce.

1 in uttility to reduce flash cooldown

It's a bit weird but with an explanation:

Q-W-E, and then R>E>W>Q.
Use at lvl1 Q to make some damage extra between each basic attack in Mercury Canoon, and get closer when Mercury hammer.
Use at lvl2 W to spam at maximun attack speed the strong basic attacks in Mercury Canoon, and get mana in basic attacks when Mercury hammer.
Start leveling E at lvl3 for two reasons: You get extra movement speed before you purchase boots (despite using R allows you to run a bit, it stacks with it) AND it does TRUE DAMAGE with hammer, that you can easily do if you have gone closer with Q or Acceleration Gate.
"Ulti" always when available because you are going to switch quite often, so you get some useful stats every 6 seconds of its cooldown.

It is based of runes I blought before. These runes are the most useful for some roles, so I bought them.

Marks from attack damage is a must. It supplies the lack of basic AD to Jayce and make his basic atacks and spamming abilities more powerful.

Seals of Resilince grow up your armor, from all of my builds except solo mid, because you usually face Offtanks AD (solo top) or AD champs (in dominion)

Glyphs of MR, because they are true glyphs, and makes you more tanky while you get ganked or in the middle of a teamfight. Specific AD or tanky glyphs are not so powerful as this MR supplies.

Quintessences of damage because it's the most important stat Jayce needs to stack.

1st buy Long sword + health potion. You covered some life steal and tanky stats with masteries and runes so you can accelerate Wriggle's lantern and not buy Doran's blade.


2nd buy Wriggle's lantern to free visors at early, damage, armor to face oponent, farm and resist with life steal. An early must.


3rd buy Choose boots:
Mercury's threads (if there are stuns, some mages, etc)
OR
Ninja tabi (if you face some AD champs)


Then, in this order:

B.F. Sword
Sheen (you spam abilities. With your attack it is very powerful to make double)

Infinity edge (then you are quite a strong AD champ, with enought resistance)

Avarice Blade (some crit to enhance Infinity edge and gain gold. You can now wait shop until trinity force)

Trinity force (enhances Sheen, makes you faster, and able to slow enemies with basic attacks. You also gain life for next item)

Atma's impaler (Armor, crit for enhance infinity edge, and more damage due to your life. It fits quite good)

Youmuu's Ghostblade (it makes you even faster when you need it. Use it when Hyper charge is on cooldown. Just for people who likes actives (even when you are playing Jayce). If you don't, jump to next item.

Sell Wriggle's when you have enought for The Bloodthirster.

1st buy Prospector's blade + Boots +1 + 2 health potions. You need prospector's blade before full AD because you would need to play more agressive than in classic's solo top. It also makes you faster and restore life to defend your point.

Then:
B.F. sword to start stacking AD
Ninja tabi (mostly AD quite common in dominion)
Vampiric scepter (even more life steal. It's the fastest way to gain health when you go full AD and need to cover)
Phantom dancer (Run run! It's a must in dominion. It also makes you fast to stack some items that you are buying next).
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I faced very often a full AD with same HP, and my faster build (with same farm many times) stacked and killed him before he did with strong and slow attack speed, so I captured the point and made the team win in two games.
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Sanguine blade - easily stacked with phantom dancer or Hyper Charge!
Entropy - easily stacked with phantom dancer or Hyper Charge! Just for active lovers
Infinity edge. Fits with Phantom dancer.