This isn't the same team that necessarily need to be carried by Amar'e. I say, if his back is still bothering him a lot, give him all the rest he needs.
Its evident we don't need "hurting" Amar'e out there because he isn't the offensive threat we need nor he tries enough on D. If his back is hurting, sit for a month or something. I think it will be enough to comeback in time to get your game going for the playoffs. But if its his back, he should rest.
We play fine when Jeffries is out there. Jorts will come back soon. Get yourself healthy, Amar'e.