EK Mara Build for 1 Week, Suggestions

Looking for some suggestions on my Mara EK build for the upcoming 1 week and for future after.

Mainly, what are the best supports to pair with EK.

Assume a 4L, because it will either be 4L or 5L+Blood Magic Gem. Plan is to run 5x Aura eventually.

I know there are a lot of options: Iron Will, Added Fire Damage, Faster Casting, Faster Projectile, Life Leech, etc.

Here is the build...

http://www.pathofexile.com/passive-skill-tree/AAAAAgEBxthYY1BQjM_2SF8_7w653fIv1I8ZLiftxPY8Lcautz7-CvJF52N6uK6Tplc64YjxtfKpbngNWK907XrvYEsFLUCgIWB08Z65GNsOrSml891N46xZ_o_FivAfBLMUTQJxuJMMfRB_xp6iAEOcPfx8uCkuVEnnUr6KAdykGRv6Jd-E2WVNR36rxeLqYSGE76cIj0bQ0M9lVcYWb52uGmwZhSSqNunjanC79to9DySLfLs62Ow4GjinhJBVTdiMdilP5CI=

This is the base of the build, there is a lot of variation I can do. It has a lot of health and I can take out some fringe 8% or inefficient health nodes to add some utility.

I know the mana can be insane with blood magic gem. One thing I was considering was going down to arcane efficiency and picking up the 20% reduced mana cost, along with the addition 30% armor node. Maybe even unwavering at that point.

http://www.pathofexile.com/passive-skill-tree/AAAAAgEBxthYY1BQjM_2SF8_7w653fIv1I8ZLiftxPY8Lcautz7-CvJF52N6uK6Tplc64YjxtfKpbngNWK907XrvYEsFLUCgIWB08Z65GNsOrSml891N46xZ_o_FivAfBLMUTQJxuJMMfRB_xp6iAEOcVEnnUr6KAdykGRv6Jd-E2WVNR36rxeLqYSGE76cIna4abBmFJKo26eNqcLv22j0PJIt8uzrY7DgaOKeEkFVN2Ix2KU_kIljbGlWazDB14dqsupe0ValgiGFSn8s=

Something like this, maybe drop unwavering the 10% armors and picking up 15% more mana reduce from near elemental adaptation.

Anyways, any suggestions? :)