Based on the document I found
here, it sounds like
SSL_TCP is the option you would use. AMQP over TLS doesn't use
STARTTLS or other custom steps so I think you should be set. Configure your applications to use TLS and the IP of the Netscaler, and whatever port it is listening on (5671 is the well-known AMQPS port, so that's a good choice). Then configure it to forward non-encrypted data to your RabbitMQ node using port 5672.
Let us know how that configuration works out.