Why is Anivia support still considered as a troll pick?
I've had a lot of good plays with Anivia as a support, in my opinion it's even better than Anivia mid.
I mean... ok... at the beginning she won't be able to farm but in mid game she'll be able to get her cs through splitpush with her R or defending towers with it.
She has also amazing CC for Team fights + there will be another strong mid laner (instead of Anivia) that deals more damage than her (e.g. Zed, Kata, Fizz).
The adc will have the easiest First Blood ever with an Anivia Q-W-Combo at Level 2 from the brush (the adc will have to play very aggressive if anivia hits her stun). Ganks and enemy dragon attacks can be blocked with the wall. Enemies chasing your team mates can also be blocked with wall, Q or R... You can help your adc longer on the lane because of your passive... so ... why not Anivia?
I know that there are some stronger enemy supps like Velkoz, Morgana, Lux, Lulu... but against all others: gg! Just train your Q and all will be fine. The trick is to predict, to which point the enemy will walk in the next 2 seconds.
I've addet a link to my Anivia supp guide, what do you think?