Ranger build help

Hello to all. I am currently in the process of trying to figure out how to make my build work. So far it seems to be going ok but my mana consumption seems to be high with the build and i cant seem to figure out a way to stem the tide so to speak

The build im going for i am calling the mirrage barrage build. It focuses on useing the mirrage archer support and the barrage skill gems. It is high attack and damage style build.

The problem is i cant seem to find a combination of gems that will allow me to make the mana drain slower. I am currently trying a combo of 2 gems, the blashmey gem and a curse gem which makes it an aura based but the radius of it is not big, the enemies have to be pretty much in melee range for it to work.

So i am seeking help. Is there a way to make the aura bigger to the enemies wont have to be so close or is there another combination of gems i can use to give me the same effect as the two gems im useing now.

And for gear what should i try to focus on getting stat wise, mana regen, mana on kill. Any tips and help would be apreciate greatly

Thank you

Pick some mana leech from tree, until then you could try mana leech gem. https://pathofexile.gamepedia.com/Mana_Leech_Support

Mods like "+2 mana for each enemy hit by your attack" could also help.