Athena support build [ 4.3 ]

If your enemies' main damage dealers are physical you'll have to choose between :
Valor, Shogun's Kusari, Discord.
Valor- will grant u some more CDR, you will have the ability to go in and out with your ultimate in a fight so your team will get a massive advantage! (6v5 kinda).
Shogun's - If your team has 2 adc's ( hunter or magical hunter) you could pick that up and make them attack quicker, it's a solid pick tho i won't recommend it always.
Discord - more overall protections, and even a stun during 30% health, with the cdr will help u get in and out during a fight.
If your enemies' main damage dealers are magical, you'll have to choose between :
Pestilence - overall a great item. mostly picked because of it's passive(anti-heal) but 80 magical protection is great.
Genji's Guard- A great pick up by athena, 10%CDR will help you to get your ult faster, rotate around the map and even go back to base and ult back during a fight. It has 70 magical protection a little less from pest, but overall a better pick up.
Discord - more overall protections, and even a stun during 30% health, with the cdr will help u get in and out during a fight.
If your team are mostly using magical damage, you can consider picking up Void Stone, it'll help them do more damage and give you some magical defense as well. It's a nice pick up but I really don't like it personally.