You should be playing tank supports

They are very good now

I'm a little disappointed by how I still see only enchanters and Thresh. The support item overhaul has been very kind to tank supports and they have been handed an immense variety of powerful items

has gained CDR, just a flat buff got a passive shield that makes you tankier and regenerates (wasn't this patch but worth mentioning) extremely strong item right now, can be used by peelers and initiators alike in the right circumstance shield scales with your HP, becomes massive late game and no longer a must-rush so you can build durability yourself. Good synergy with I don't know if this item is actually good or not yet but a 10 second AoE slow zone + damage boost can't be that bad now a very potent MR item that also helps your mages out. Definitely a must-have if you have a magic damage carry or have a mostly AP comp. Will be even stronger for tank supports when Catalyst is put in the recipe and it gives you HP/mana sustain

the biggest and most important change is the adjustment of CDR to be more friendly to tank-support builds. Mid-game slumps are much less punishing because it's easier to itemize for health/resists and cooldown reduction. Late game you're just as tanky as a solo laner thanks to the passive shield + the fat chunk of resists/HP each item gives you. This patch has been very generous to support tanks

probably comes out of this the strongest because in addition to using all of these items very well he's the only tank support who still has great synergy with Redemption, thanks to being hybrid enchanter and running Windspeaker's. He has by the far the most build variety and has turned into an incredibly flexible champion

all very viable and very strong right now. start playing them