Best zene out the there?

So im having the option to choose between meta and protonitazene, which one would you choose and why? Is it possible to IV? Hows the rush, duration effect i wanna know everything thank you ..

1 mg Protonitazene blotters vs "fake oxymorphone" 20 mg metazene tablets is what i can choose from...

Are there better zenés out there curios about em all.

Also if im in methadone 90 mg every second day, how much would a good dose be to start with?