good build

I retract my earlier comment about Infinity Edge. Playing more with Jayce makes me realize how much he relies on abilites that are AD-scaling spells and not auto-attacks (until late game, anyway). So you have a convert on that point!

thanks, I guess i got some changes to do. I haven't really made much thought on the items, But I stand to have bloodthirster before infinity edge to max the stacks earlier and because it's cheaper, and gives more AD when maxed stacks.

Love your runes.
I like your AD masteries. I think you're missing some better offtank options, like Mercenary or Enlightenment, but whatever.
Your skill build makes sense to me.
Items: For AD, Jayce's base AS isn't very good and he has a low-cooldown steroid that makes stacking AS nonsensical. I would get Ionian's or Mercury's Treads instead of Berserker's Greaves for this reason. I would also like to stress the strength of Infinity Edge over Bloodthirster, primarily because your spells don't benefit from the lifesteal (though they can't crit either). I would NEVER get Sword of the Occult unless you're pubstomping, but don't take my vehemence as an indicator of a valid opinion. I might get a Youmuu's Ghostblade. Everything else looks great.
For offtank, don't get Zeke's Herald. Get a Wit's End. Everything else is optional, though I love the new Ionic Spark.