Nuevo Cosolete Enm+5/FastCast+5 is better than whatever IR body will be.
I sure hope not. I want something even better if they'll release it.
A body with high hp, high MDB, and high enmity in the range of 6-7 would be usable in a few fights over the fast cast for an idle piece. Then we'd have a refresh body, a fast cast body, and an easily obtainable high enmity and MDB body for high magic damage spamming mobs.
I'd be happy as a pig in ****.