Hey! This is my first guild for jayce Hope your liked it xD

Brute Force Pros:
Jayce have Ulti when lv 1
Epic skillshot nuke!
Scales perfectly well with his combos
His early game till late game is really fine
Sunder Cons:
He hate viktor D:< ---> Viktor
Very Squishy if not played properly
Barely any escape skills

Greater Mark of Attack Damage : Attack Damage for Last Hiting Minions(recommended!)
Greater Quintessence of Desolation: It gives 10 Armor Penetration which help in Harassing
Greater Seal of Armor: A Base Armor which allow Jayce to be tanky in early game!
Greater Glyph of Scaling Magic Resist: Base Magic Resist If you have laning difficulty with Mages

For Masteries, I Pick 21/9/0 As 21 on Offence and 9 on defence...21 offence giving jayce A little Attack Damage+Armor Penetration While the rest to Armor,Magic resist and health....You can also use 21/0/9 for Damage and mana....For my opinion...Jayce W Passive while in Mercury Hammer it heals back your mana per hit so its better for Damage and Health masteries! xD

Jayce start off with boots and 3 health potion as it can stay lane longer and chase down enemy with the help of boots of speed :)...This is the part where you must not fail in this build..Last hiting minions is where you must get your first pain item..(B.F Sword!) When you got this item it can help you last hit easily making your next few items easier to be purchased...For Trinity you almost press R every time for jayce trinity give you bonus damage for each skill you use and it a great item! xD The next item! Maw of Malmortius~ At this moment your health is pretty darn low...This item gives you AD+SHIELD+MAGIC RESIST....So its not a bad choice either....Infinity Edge! Yes it gives crit chance and AD...You all may think jayce don't even need it..But when you have Bloodthirster and Infinity Edge...Your Hyper charge gonna screw them up!..Finally Guardian Angel.....When this is your last item..Than your most probably Aimed in every teamfight so this is your last item

Ignite:first blood or bonus AD when used
Flash:Escape or to chase since jayce only escape skills is MOVEMENT SPEED....So its highly recommended
Teleport: Not a bad Spell but not recommended
Heal:Its helpful in teamfight or surviving....
Ghost:Not really recommended since Jayce have self ghost in himself
Revive:Highly Not recommended
Exhaust:Helpful in 1 vs 1 or using exhuast on AD Carry will help your team to win in most teamfight

Heres my guild! Hope you all enjoyed it..Have fun! xD.