Yeah. You should consider taking a break from the amphetamines and you can continue on the benzos. The amphetamines make the benzos alot less effective. You should be able to take less. I would try cutting back .5mg on the benzos or up to 1mg depending on how much you take. Then go back up to your old dose and it will work a lot better.
You should consider taking less rather then taking a break. Give your gaba receptors a break.
I could probably help answer this question better if you told us what benzos you take and at what dose and how long youve been taking them for. If you were looking for a short term solution though, opiates would make you feel them more. Dont take anything to strong with them.