You need to have alot of wards, Its very important for the team. It make them care more, and they can see when there comes someone to gank, You need also to use ur CV when its not on CD.
Here comes a pic, it shows you where you can put the wards.

In the team figths you need yo make everything to keep your teammates alive, its like they dont care i your dead or not. You need to offer your self for them. If your teammate is low on HP and you is also low on HP, heal him instead. That will make you to a good support.

Ur not gonna farm. Give your team/laner the creepfarms. When you go lane with a AD carry. The ad carry always needs to farm many minions, so dont steal them! It will make em mad!

In ranked, its always good to go with AD carry, supp and ad carry is very good. So remember in rnaked, You go bot lane with AD carry. You always need to put out the wards! always dont forget that. In case you forget it, you will make your team mad..

Your items, needs to be good for the team, like you have to buy some Aura items. Thats important cuz the other in your team is not suppose to do that. So aura items and MANY wards.
You can change some AEOs with gold per sec, if you need the gold fast.
If you want to change them you can change Stark's fervor with some good gold per sec.

I take 0/5/25 cuz i need the gold per sec, cuz your not suppose to steal kills or minions from your team. And the manareg abality is wery important that will make you to stay in lane more and be able to heal your team alot!