Okay now that I see the reasoning behind the dictate, Yes, I would think that would be a great idea.
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I would suggest taking out Dictate of Heliod, just because it seems out of place in the lifegain theme. Also there seems to be too little removal for a deck without flying or reach. What would you say about switching Sidsi's Pet with Insatiable Harpy?
I really like how this deck looks! May I suggest the Ordeal of Heliod or Sunbond?
yeah no problem!
I feel like you should have a few exile cards, in case indestructable cards get past your counter spells. Although I am not very expierienced with control decks.
Finally a budget jeskai with Narset.
See what you think of my deck http://www.mtgvault.com/iceninja/decks/minotaurs-hordes-of-death/
Interesting deck, but what about Rageblood Shaman? and Felhide petrifier?