What should i do with my magic the gathering deck?

I see that your entire deck is based off of life gaining. Although cards like Leyline of Sanctity and Phyrexian Rebirth are excellent cards, but the point of your deck is to GAIN life as much as possible hoping to draw out your opponent to his or her very last card. In general, your creatures are weak. Yeah, it's great that Lone Missionary heals you and can block creatures, but it will die VERY easily from, say, a Prodigal Pyromancer and then you wouldn't have a creature to enchant with your Celestial Mantle. My brother's Ally deck is very similar to your deck. He has cards like Hada Freeblade and Ondu Cleric, both that function as attackers and healers at the same time. What I'm trying to say is, you need less fragile creatures, creatures that wouldn't die so easily when it's summoned but strong enough to withstand a few punches from like a Vampire Lacerator so that you can actually utilize the enchantments of the deck (Also, I noticed that you had Lightmine Field. Most definitely NOT a card to put in when most of your creatures would die if you had them both out at the same time)