2. Use spintax feature available in v9.2 or above to randomize the message. Below is the example of spintax.
{Hi|Hey|Hello},
How are you?
{Best|Kind} Regards,
Ravi
In the above message, it will choose Hi, Hello, or Hey randomly for each message. This helps greatly to randomize the text.
3. Add random number using new feature added in v9.2 or above for more randomization. You can do this by adding "%random-10%" without quotes in your message. You can change 10 to any other value. It determines the length of the random number.