I guess you made this deck with whatever cards you have right? Because you have a whole array of mixed cards that dont really make sense. In effect you seem to want too much which reduces the deck's efficiency.
1. remove all the bolster creatures, this is way to slow. You want to
deal damage with your creatures, not keep them at home for training.
2. remove all instants and sorceries except for
harsh sustenance, get 4 of those
3. get 2 more
siege rhino and 3 more
ajani's pridemate4. include 4 vampire nighthawks for easy deathtouch
5. since you are playing green, include 4-6 rampant growth-like cards.
6. include 2
vault of the archangeli could go on, but you should really check
http://gatherer.wizards.com/Pages/Advanced.aspx Fill in rule text what you want (things like,
lifelink or gain life etc) and in colors get not blue, not red. etc etc. You will find what you are looking for for your abzan lifegain deck (: