I've had anxiety/insomnia issues for most of my life and I've tried many things.
I've tried Remeron and it was okay but I gained quite a bit of weight, trazadone and that worked really well but it has 1 drawback in the it completely blocked my sinuses. I'm talking 100%.
What works best for me is ambien. I've been taking it for several years and its consistent. I've even went from 10 mgs to 5 and I think the lower dose works better.
So there's not a tolerance issue and its much safer than ativan.
Hope that helps.