3v3 Starting Items:
I grab boots just like S2 and S3, movespeed is just always nice and with the "redistribution" of movement speed from boots into champion base movement speed, Tier 1 Boots are nice to have early and getting Tier 2 boots quickly makes for a nice all-around performance boost. As I mentioned in the Masteries and Rune sections, I believe that the majority of very early damage (i.e. level 1 teamfights) comes from AA's, so that's where the cloth armour comes in handy. I almost always build this into Ninja Tabi (
) later. Health Potions are almost always necessary to sustain yourself in lane since you have no innate methods unless you brought lifesteal quintessences. (Which I do recommend against a passive lane where you can harass well.) Keeping health potions in your inventory is never a bad idea, I keep a couple until roughly level 10-13, depending on how well I'm doing. Potions have saved my life from many a Teemo poison, amongst other things.
5v5 Starting Items:
Use the Hunter's Machete for jungling; I don't build Wriggle's anymore so I almost always start Cloth Armour and 5 Pots for jungling. Boots are still an OK start top, but I would only go with those if there are skillshots to be juked. Otherwise go Null-Magic Mantle if against an AP champ, Cloth Armour if against a heavy AD champ, and I have grown to like Doran's Shield if against someone with DoT effects or a combination of any of the 3(i.e. Darius, Teemo, the like.)
1st Back Options:
Depending on how you feel your laning phase will go, grab either:
if you want to build
if you want to build
Always make sure to grab some
for vision and sustain in lane.
Assuming you're playing safely and avoiding ganks, try to aim for either the Cutlass or a Triforce piece by your first back, as getting a big-ish item early in the laning phase can make your life a lot easier and help you snowball a lot earlier into mid and late game.
Sometimes with some games, I find myself building pieces of both items simultaneously, Cutlass is unavoidable for the sustain it gives, and phage for tankiness. Early Sheen for the lolz and extra damage.
After that, I build whatever fits the game. Does the tank need help sharing the pain? Help out with a tanky item of your choice. He's doing alright or someone else has assisted him in that department? Feel free to build damage to help you on your quest of destroying squishy targets. A combination of both build paths is what I find myself doing most games.
Typically I find that building some AP early when my lane opponent is building armour helps immensely since he hasn't built against it. (Helps against those Darius and Malphite lanes.)
TL;DR: Build BotRK & Triforce -> something tanky -> moar damage -> moar damage OR tanky item.
Other Viable Items
: Lots of armour, mana, and the awesome passive that helps you on your mission to kill enemy carries. This is near-core on Jax in my opinion.
: The stats are good on Jax; the only thing keeping me from buying it is the wasted passive since you already have it from
, and that one is better. Up to personal preference if you want to build it.
: Getting this once you start getting focused is an excellent buy not just for the passive but obviously from the armour and MR.
: Always a good choice if unsure how things are going; more damage to the enemy never hurt anybody. Wait...
: I actually really like using this on Jax; free CC, health, and armour. What more can you ask for?
: It's ok, it's another niche item if the enemies are stacking armour out the Wazzu.
: HUEHUEHUE COUNTER ALL THE AP'S
: Another item I almost consider core on Jax, although only if I'm going AP + Attack Speed route.
: BOP ULT HURT
: Second only to Sword of the Occult in terms of top AD, BT is definitely the way to go to enhance your sustainability and damage output.
: For 3v3's, substitute for Bloodthirster and Ravenous Hydra.
: I LOVE THIS FUCKING ITEM
: Substitute for Rabadon's in 3v3. BOP
: Good stats for an AP-oriented Jax, armour never hurt either.