No, actually, Triamcinolone cream, being a steroid, will decrease skin immunity and make scabies worse. It might help with the itching but you would be better off with Sarna Lotion which does not contain steroids ( Sarna is actually Spanish for scabies!).
You might use Permethrin again, and be sure every one in the family is treated. The most common cause of scabies treatment failure is not including non-affected family members.
Happy to answer further questions.
If your case is a difficult one, Ivermectin can be used. This is a pill, but is off-label and not for children.
I am moving this into the Q & A mode, but you can still respond if you like.