In the words of xchain.io website:
This site is currently undergoing an upgrade and will be updated when the upgrade is completed. Thank you for your patience!
I want to make a Token on Counterparty, so what is the best way to do that?
Tokenista, the explorer is not functioning because the whole system is undergoing massive upgrade which is nearly complete. After this time it will be possible to create a token using multiple different methods.
There's still no more better way to create a secure, immutable token than on Counterparty, is my opinion. I would recommend to Tokenista just creating tokens through the Counterwallet (after the update has concluded, of course).
Why create a token on Counterparty? It is backed by the most secure blockchain on the planet. The security of Counterparty tokens are insured by the equivalent of the crypto Lloyds of London. Newer, token-centric blockchains come and go but Bitcoin ain't going anywhere for a long, long time.
I plan on making at least one and showing other people how too.