Enchantment help

[enchantmentman]

I have a deck with lifelines and angelic choruses and i have master healers, avatars of hope, and radiants dragoons. I want them to leave play and come back through the lifeline so i can gain more life. I only have one problem. I need something to sacrifice the creatures to so I can get them back. It would preferably be green white or artifact. I would appreciate a few card suggestions and maybe some other good card suggestions for making my deck tronger. Thanx

 

[Hetemti]

Altar of Dementia, in case you have to bide time.
Ashnod's Altair, if you need more mana.
Claws of Gix, more life.
Life Chisel, even more life.
Phyrexian Vault, card advantage.

White would rather tutor an artifact than sac critters itself...but Heroism will do the job.
Martyr's Cause, and Scapegoat too.

As for green, only Natural Order and Greater Good (Zadok!) come to mind.