also speaking of items the new support core is probably going to look something like GP10, sightstone, boots, chalice (since mikaels is cheap now and MR is hard to get for supports otherwise)
and the full build now is probably going to be something like Full gold item, Ruby sightstone, boots, Mikaels, Locket (not cheap but good for lategame and gives needed tankiness for philo and kage paths), and finally either OHMWRECKER (cheaper and good for philo path because it gives HP and for kages path because it gives HP+AP) or Zeke's (for emblem path because it gives CDR which you otherwise kinda lack and MORE HP + lifesteal for everyone) or you could build whatever the fuck you want because the game is probably over at this point
for the emblem path, you might as well grab Zekes for CDR as the final item because at that point you'll already have 1060 HP, 45 armor, 60 MR, 35 HP5, 12 MP5 + chalice passive, and 10+5% CDR. Either that or you can grab a real tank item like Randulins, spirit visage, or warmogs but that late into the game the ADC will just melt you regardless of what you get. Okay actually Spirit visage might be the best choice because it also gives 20% CDR and additional HP, HP5, and MR. If you don't care about CDR thought then just grab OHMWRECKER to help those inhibitor pushes. The AP is kinda w/e but hey more HP and dat active.
for the philo path, after you get aegis, sell ionian boots for ninja tabi before upgrading to locket or else you go over the 40% CDR limit, or you might as well get ninja tabi from the start. or just go ohmwrecker and forget upgrading to locket until there's nothing else to buy. In the end with 5 items you get 660 HP, 45 armor (with tabi, 20 without), 60 MR, 20 HP5, 27MP5 + chalice passive, and 35% CDR (or 40% with ionian at the cost of armor). So you gain CDR and MP5 at the cost of HP and HP5, so it's for squishy ranged supports like Janna/Soraka. You probably also want to upgrade your sightstone to ruby sightstone asap for that extra HP whereas the emblem path can hold off on it for a bit.
finally the kage's path is kinda weird. if you build it like the other paths then you basically lose out on everything (CDR, HP, HP5, AND MP5) for uh 50 AP :/. However since it was likely made for unconventional AP supports like Annie, then you have the option of forgetting the utility based items and going full pseudo AP using Kage's to supply you with gold instead of farming. So then after getting Shard of True Ice, Sightstone, and lol Sorc Shoes, you can grab Morellos + distortion boots for CDR letting you land more flash tibbers. Then you can get the rylai's + lyandrys combo for burning tanks especially for supports with multi hitting spells like Zyra, or go full pain mode with Deathcap + void staff, or get abyssal + ohmwrecker for team support.
at least the kage's path is way better than before. It now gives much more gold and early mp5, while before you had to sit on an abyssal tome if you got behind and then fall behind even more.
oh man emblem/Targon's is everything i could have asked for in a support item though:HP, HP5, AND you get to help your AD cs
also the other two support passives you actually get mini version of from masteries (pickpocket and non-cs)
which means with Targon's and masteries you get:
1.5GP10 from masteries
3GP10 from runes (but actually i dont think you even really need these anymore, might as well get all HP and just become an unmovable monster in lane with 164 +3% EXTRA HP AT LEVEL 1. That's a 632 HP level 1 Sona or a 718 HP LEVEL 1 NUNU. But of course you can still roll with em and have EVEN MORE GOLD)
1gold per ally cs
3 gold per 5 pickpocket (which is actually stronger than beginning kage's which is only 4 per 10 ie.2 per 5) OR 15 gold per assist (rake em in leona~$$)
and 2 cs per minute
in other news, the garen passive mastery currently doesn't actually work :/
oh man i can see how madlife broke the game now. if you could have all 3 gp10 it would be insane, and they synergize perfectly. Kage's passive potentially can give an insane amount of gold but you need hp, which you can get from targon's. Then after the enemy recalls/dies you get passive gold from philo and targon's and you rake in as much money as a full team of bankplanks.
actually it would be funny to run kage's soraka so while your enemies ignore your bananas as they seem to do nothing, in truth you are getting MAD FUCKING GOLD
8GP10 per enemy x2
+ 3GP5 per enemy x2
+ 5GP10 runes
+1.5GP10 masteries
+4GP10 from kages
= 38.5GP10 = 231 GOLD PER MINUTE THAT'S FUCKING PERFECT FARM SOLO LANE GOLD RIGHT THERE
it actually works well for annie too since her AA range is so large
of course in practice this is impossible but the potential is there