Twitter Account Warm up Bot

When using a fresh Twitter account, often when it replies to tweets/ uses hashtags etc it does not show, or shows very few in comparison with an aged account.

Does anyone have experience with using a bot to warm Twitter accounts?

I am wondering whether it is worth having a bot developed that will log in to these new accounts, PVA them, then send a natural tweet per day, likes and a couple of RTs and follows for a couple of weeks? Do you think this would make the account show more than a fresh account, or is it only about the actual age of the account?

I prefer to warm up accounts manually and naturally for about two weeks. I find it gives the best results.