Esper combo control shell with Steward of Solidarity and Intruder Alarm as the combo. Non-combo wincon is creatures with vigilance. This way you can still attack while Intruder Alarm is on the board. Sun Titan can get both combo pieces from the GY with it's trigger as well as Snapcaster Mage, Spellskite and even lands.
The sideboard is pretty flexible, just use whatever you need against your meta. I have the Batterskull in the sideboard for both the life gain and in case I want to go more creature heavy. Though I typically don't find myself siding out the combo for the creature like in twin. It's harder to "scare" your opponent into inaction due to the combo not being instant. As such, I find it hurts more by not having the combo.
I'm not set on the counterspells yet and need more play testing, but the intention is to use as many 1 mana counterspells as I can to be able to protect the combo on turns 3 and 4 if needed. Obviously against a non-interactive deck, just go off on turn 3. But I like being able to go off turn 4 while having protection online instead of having to wait until turn 5. Unfortunately, the combo isn't instant speed, so running 4 Dispels isn't going to suffice. It's not twin in that respect, but it's a whole turn faster which makes it much more viable than Felidar Guardian and Saheeli Rai.
Alternatively, you could run Cryptic Command instead of Sun Titan to synergize with Intruder Alarm by tapping your opponents creatures, but I find Cryptic Command doesn't help protect the combo as easily in the early game. Of course, if you were to do that, you would want to run Serra Sphinx instead of Serra Angel to ease the mana requirements. I personally prefer having the 1 mana counterspells to hold up for turns 3 and 4 while going for the combo.
Please upvote and give suggestions!
