[Patch 3.03: Quinn] General Discussion - Page 95

I dunno if there are any resources but builds for AP at least haven't changed much at all with the notable exception that Tear is a lot more viable on champions that it previously wasn't viable on (it charges faster and it's cheaper plus its upgrades are better). You still want deathcap and voidstaff and probably Zhonya's maybe Abyssal's at some point. A few APs like Liandry's Torment but most of them still like deathcap builds. Of champions that need mana the only ones that really build chalice/athenes anymore are Orianna and Lux (but you could probably go Tear on Lux if you wanted). Since the athenes buff it might be more viable than Tear on some other mana reliant AP mids.

DFG isn't as great as it used to be but it's still pretty mandatory on AP assassins. AD assassins love BC. Builds basically stayed the same for them too although Warmogs is generally better than GA and against heavy AD teams Randuin's Omen is better than both for your defensive item.

Support has a multitude of viable build choices but as a general rule you want sightstone and you shouldn't buy gp10 anymore (although after the change to philo stone hits that item will probably be good to buy). Locket and/or Bulwark are good items to get after your sightstone. There's really a multitude of support items that work in S3 and it's really dependent on what your jungler is building/what support you're playing.

Bruisers have a lot of build options. Most bruisers go tanky first instead of damage first but this is still reliant on which bruiser you're playing. Attack speed centric bruisers like Jax or Irelia could probably go BotRK and Zephyr despite the BotRK nerfs (although once the Sheen buff hits and Trinity gets cheaper you'll probably be better off just going back to Trinity). AD scaling bruisers still prefer Bloodthirstier. Cooldown reliant bruisers (so lots of them) can get away with like Locket+Spirit Visage and delay damage items for later (although BC is still a good choice if you aren't gonna get Visage or something to CDR cap yourself).

The biggest thing about S3 is that there are, imo, a lot of viable build paths which vary depending on your champion, your team comp, the enemy team comp, and the flow of the game. If the people you're playing with are good you'll probably see a Locket and a Bulwark in every game.