personally i build my jax starting a dagger and a ward, run tele and ghost, tele to my lane early and ward either red or blue on enemy team. on first b ill grab another dagger and starter boots. then i get blasting wand and 2 more daggers so now your inventory should be 4 daggers, blasting wand, and boots. build 2 of the daggers into stinger. then get a rageblade. builc zerkers/ tabi/ mercs depending on how the game is going build malady and nashors tooth next. then get gunblade and if the game has gone on for that long, go for the trin force or w/e you need going by the match