I've got enough IP for a champion, and I'm looking at 3 for the support role (Tahm Kench, Thresh, and Nautilus). I should point out that I'm not looking for the more popular pick or which one's the most difficult. What I do want to know is how they play, what areas they excel in, and what each one has that the others do not.
Thanks!
Well those 3 are usually the Tanky types of Support, so they have that in common. Thresh and Naut have a "hook" to help get you to the enemy quicker which could help especially in team fights! Tahm is fairly new and if anything he should be on Free Rotation come next week. so if anything you can always wait and try him out.
Forget all of them and use Brand, the most effective support in the game offering a dot which fully supplies his spellthief, cc, zone control, and enemy max-hp% dmg.
Thresh is a good champion for solo que I recommend him
is probably easier to carry a team with, 
is probably a little better if your team is decent.
Get Leona. She's easy and has a shit ton of cc. Build full tank.
