Super funny Swain, Brand, Malz, and Zyra support strat.

Laning phase is normal, get this then get sightstone into and be an ass in lane with poke but safely.

Here is where the fun begins, notice how all of the mages I mentioned have hard CC and obnoxious damage? Get Rylais and then start the fun build.

This sounds weird but nobody expects a on a support. You can pressure lanes with it and put it in the middle of the lane to force the enemy to try to kill it but you have so much shit and Rylais that you zone them hard. For added effectiveness be a split pusher if it is smart with Zzrot and banner of comman if the eneny waveclear is magic damage. If they do fight you you can kite and make their lives hell. If the enemy adc fights you get ready to collect free gold.

Try it out, it works nicely.