I've never tried temazepam, but benzos are generally helpful if you've bit off more than you can chew. It all depends on how far you wanna go man, only you know your mind. If you are sensitive to psychedelics or uppers, maybe scale it back a little, that way you wont have that initial anxiety of taking a large dose. But if you're doing a real face melter of a trip you really should just wait for the right day, it's hard to schedule a good mindset for a trip haha.
[TABLE="class: chart"]
[TR]
[TD="colspan: 2"]
[/TD]
[/TR]
[TR]
[TD="class: chart2, align: center"]
Threshold[/TD]
[TD="class: chart3, align: center"]
0.5 - 1 mg[/TD]
[/TR]
[TR]
[TD="class: chart2, align: center"]
Light[/TD]
[TD="class: chart3, align: center"]
1 - 2 mg[/TD]
[/TR]
[TR]
[TD="class: chart2, align: center"]
Common[/TD]
[TD="class: chart3, align: center"]
2 - 6 mg[/TD]
[/TR]
[TR]
[TD="class: chart2, align: center"]
Strong[/TD]
[TD="class: chart3, align: center"]
6 - 10 mg[/TD]
[/TR]
[TR]
[TD="class: chart2, align: center"]
Heavy[/TD]
[TD="class: chart3, align: center"]
8 - 12 mg[/TD]
[/TR]
[/TABLE]
^tentative dosage scale from erowid
EDIT: i just realized you may have been talking about temazepam dosage, it doesn't take much benzo to cut through a psychotic episode. It has a really impressive ability to take you from a racing anxious mind to a mellow euphoria in no time.