Soul Sista (Life Gain)

This is a remake of the white life gain deck player by conley woods in the united states nationals 2009. I thought the idea and play style of this deck and its triggers seemed really really fun so ive taken the time to revamp it back to standard! But moomoochan isnt this deck a pos for poison control?: Even with the release of scars and poison critters this deck fairs very well. the point is not to have a ton of life so your opponent cant kill you but to get the activation effect of some of your really good win conditions, serra accendant and a beefy ajanis primemate. The main board is for facing any jund or valakut decks. the side board is meant to face just the opposite, blue, and blue white control. I keep the kor fire-walkers in my main board because i believe they are a very very nice solid choice against most decks you will face in a tourney. The only problem is i seem to have some trouble against heavy black control. this is the reason i post this deck xD i need some suggestions to over come these problems. I feel like this deck may need more flyers or low drop life gains. im also partial on choosing either devout lightcaster or white knights against black or black control. not sure. thats why im posting it =p