My Atro is awesome...he usually lasts long enough to get the job done. Sometimes I hang back in stealth and flame arrow what he's tanking (hopefully getting x-damage once or twice), but when I get rushed I have trouble getting my dual swords cast before I go down.
The other way is cast summon, then go right to dual conjured sword. But again...I get rushed and go down quickly.
I'm thinking maybe a should scrap the whole bound sword thing and get a few nice daggers that I can whip out fast.
I'm not sure about the bound weapon thing in general...maybe the system is broken.
