Goal: Stabilize til turn 5 then just never die and eventually get uncontrollable.
Mainboard:
Ajani's Pridemate: Excellent creature and is a nice addition to my mana curve (only two drop creature). This is also one of my win conditions.
Soul Warden: Annoying to deal with especially if you go first. They are at 20 you are at 21 or if no one drops they are at 19 and you are at 20, "An advantage, you must have" Yoda. Also makes Ajani's Pridemate a 3/3 on turn 2.
Path to Exile: If your modern deck is even splashing white you need this card. It shuts down Predator Ooze, and many other things. Being ahead in lands isn't necessary considering you just killed their one drop.
Fiendslayer Paladin: Good in its own respect but also helps the tempo and having hexproof against black or red spells is a nice addition.
Congregate: You could make argument for Timely Reinforcements in this slot, but Congregate gains you more life.
Rhox Faithmender: Solid 4 drop and is great synergy with everything else.
Ajani, Caller of the Pride: Solid planeswalker and giving flying and double strike is amazing. Also pumping up Ajani's Pridemate and other creatures is a nice bonus.
Honor of the Pure: Pumps up my creatures and helps man curve.
Archangel of Thune: Incredible synergy and main win condition. This deck was not threatening before she was printed.
Baneslayer Angel: Great finisher and is great when played after Archangel of Thune.