TweetAttacksPro, link in my profile bio , is the best twitter bot for DM I have used in the passed few years.
We can scrape someone’s followers, then filter out those who we can DM to, then use multiple twitter accounts to DM to different people with different conents. Hundreds of messages can be sent to thousand people in few mins. It help me to get followers and project promotion greatly.
TweetAttacksPro also offer 3 days free trial, anyone can have a test on it before deciding to buy it.
Worth to have a try.