Mixing cannabis with any of the above substances is safest, weed is one of the best combination drugs around, and the safest.
As far as "vic" goes, I'm going to assume you mean "Vicodin", which is hydrocodone.
"perc" is "Percocet", which is oxycodone.
and T4's are codeine, correct?
Hydrocodone, oxycodone and codeine are all opiates.
Xanax is alprazolam and Klonopin is clonzepam, they're both benzodiazepines.
I wouldn't mix any of the opiates together unless you've got experience/tolerance doing something like that. What's your opiate tolerance?
You can mix one of the opiates with cannabis (kush) or one of the benzos with the cannabis and it will be a safe combination.
Mixing opiates and benzos isn't recommended unless you've got tolerance for one or both of the drugs. What is your benzo tolerance?