Kan, Jayce is so versatile and OP i don't think there's a wrong build for him.
But yeah Hyper Charge is stupid broken, not only great for killing champs but also makes Jayce an insane pusher if he builds damage. I do build some AS on him because I get Trinity Force on him. With how often he can spam abilities I can't pass up that Sheen damage, and everything else on Trin is just added gravy.
--
"Black Turtle runs alongside balefire watching marshmallows stop existing"