So over the past year this deck has changed a lot. I still want to leave the Divinity of Prides within the deck, since they are one of my favorite cards but the deck is no longer quite as much of a martyr proc deck as a WW deck. As such most of the Proclamation of Rebirths have been removed and the standard soul sisters have been added. I know a lot of people have been adding Spectral Procession and Honor of the Pure but personally I prefer having a few stronger creatures in things like Divinity of Pride and Ajani's Pridemate to running a true WW deck.
New Card Choices
Personally I love this card. Not only is it one of my favorite planeswakers as a three drop but it also allows you to give an Ajani's Pridemate flying and double strike. It isn't inconceivable to be able to swing on turn 3 or 4 in the air with an Ajani's Pridemate for 14 or even more. In addition it also improves Figure of Destiny by making it's 4/4 state very very useful.
Once again just another card I really like. It allows you to control a bit towards the end of the game if necessary and is also another card that loves Ajani, Caller of the Pride. Gideon Jura also survives a Day of Judgment and leaves you with a powerful beater if you have to actually wipe the board.
As a one of it isn't really that powerful however if you do get it out on turn four it can seal the game. Because you have so many little guys sitting around not really attacking Sublime Archangel just works to buff your serra ascendent.
I don't think I've ever seen anyone else ever run a Mana Tithe but personally I've found it to be very useful. Even though it only adds 1 to the cost of their spell it can do things like stop a turn 4 Bloodbraid Elf and works to slow down most decks just enough for you to be able to stabilize and go on to win.
