Yeah I kinda like valium because its strong enough for overall relief without causing too many urges for the next dose.
Its also strong enough to substitute for some sleeping pills which is always nice to not have to take those, especially when its anxiety that is keeping you awake. Its more useful than Restoril in my opinion because you can take it during the day. Pretty good for preventing the escalation of anxiety into panic, It could also be used for panic.
I would ask about the valium to stretch your need for the next xanax, it seems like it would work well because valium would last a lot longer, its not as good relief but valium is excellent as a benzo you could use to get off other benzos. Infact if I had to ween off any benzo, I would switch to valium and ween off of the other drug substituting with valium, its long lasting effects would keep you from withdrawing so quickly, like with klonapin, xanax or ativan.
Ashton manual has an equavilentcy guide you can use to determine the appropriate dose of valium to equal the strength of the drug your taking if thats needed. The guide was actually made with the intent on using valium as a substitue for any other benzo and some other benzo like drugs to ween off and eventually be free from benzos all together. Her reason for suggesting valium was because of the drugs long half life to prevent having big withdrawal effects from the process. And also because Valium comes in an easy to deal with dose, in its smallest form it comes in 1mg tabs which you can cut in half for 1/2 mg doses.