Yes in first Time you don't have a lot skill but you can auto attack on top lane because top lane is mostly player use melee range champion and tank to play you can auto attack for a little poke when you lvl 2 you can use [Shock blast + Acceleration gate] to poke, yes is poke and power full and auto attack again when lvl 5 you can kill him with skill [Shock blast + Acceleration gate] and come closer use skill Hyper Charge and change [Mercury Cannon] to [Mercury Hammer] and use [Lightning Field + To the skies!] When him will die use [Thundering Blow] +(Ignite) that get you kill LOL

jayce can't engage in front of war like a garen,darius and Other Tank Champions. but He can poke and they Health will Low, Yes you Team can eazy Finish that fight and get Ace

[Shock bl [Shock blast + Acceleration gate] + [Hyper Charge] Change [Mercury Cannon] to [Mercury Hammer] + [Lightning Field + To the skies!] + [Thundering Blow] + (Ignite) = GG