Pyromancer's Swath is never a disappointment to give someone. I like it. +1

That's definitely worth consideration..... I like where you're going with that, and thanks for the +1.

I love Zedruu and your deck so +1. Have you considered Archmage Ascension ? I think It would work extremely well in your deck. Also, Jace's Archivist could be pretty helpful.

Thanks for the +1. I can't agree with Jace's Archivist here, to be honest, as my deck is built to hang onto a lot of its cards as answers to things, and the list is getting less and less room for cuts. I do like Archmage Ascension here, though, for many of the same reasons I don't much like Archivist. I am thinking of ways he could be very good, but I'm not yet ready to test it here.

I'm unfamiliar with Zedruu decks but maybe I can offer some advice since I often play control EDH.

Stranglehold is very, very good.

I'd replace the group-hug stuff like Words of Wisdom , Temple Bell , and Howling Mine unless you really need the political leverage for some reason. This ain't no Nekusar! Replace with toolbox cards like Enlightened Tutor , Mystical Tutor , and Sensei's Divining Top .

Needs more removal! And countermagic. Swan Song is a very good card... and not only in EDH.

Do you face voltron in your meta? Condemn is good, as is Unexpectedly Absent and Spin into Myth .

Also... please... cut Dissolve for Counterspell !