This deck has to many high cost spells and not enough low-mid cost acceleration: blatant thievery, gather specimens,thran dynamo,bribery,dark ritual, archaeomancer, nmemonic wall, ghostly flicker,demonic tutor,dreamstone hedron, acquire, jace's mindseeker, sculpting steel,grand architect,azure mage,cackling counterpart Try these I'm in the middle of building a sen triplets deck but mine is going to be a triangle of tefrie ob and tez with a splash venser

Hey, nice deck. I explored yours when developing my list. I have only played it a few times, but it has played out pretty strong, and is pretty fun. The humorous groans as I bounce an opponent's threat and then recast it are amazing, and result in some serious shifts in the way the game is going. It has also been fun to lend other players a helping hand by casting an answer to a common enemy out of their hand when they are not able to. I am now a Sen Triplets fan. I would love you to check out my list and make comments from your experience. Our decks have slightly different focuses, with mine skipping the big bomb creatures like the sphinxes in favor or more control and I am hoping a really good ability to select from the best of the best of my opponents' threats to steal for myself.

Sente: The Politics and Metaphor of Stones

Let me know what you think, I appreciate feedback a lot during deck development. It seriously helped during the development of my favorite deck, Queen Marchesa: Politics, Aikido, and Control. I hope to recruit some help in developing this one.

btw, with Esper colors and Memnarch in your list, it seems you could benefit from Merieke Ri Berit. With Bloodchief Ascension, you could go for the non-infinite combo of Zur's Weirding. Have you considered either?

You wish to have dominance over your opponents right? Why not put in a Telepathy to gauge their every move? Brago, King Eternal needs to be in your main board. But that is just my personal opinion. He is a pain in the patella to get rid of and that is, I believe, what you wish to achieve. Fated Retribution is also a boardwipe to consider. I hope these suggestions help a little!

What about Empress Galina & Merieke Ri Berit ?

Manalith would be strictly better than Obelisk of Esper here