Participation in the auction has mainly two objectives ..
1 Winning auction
2 Take MRP to convert to VP
In both cases, the use of auto-bidder is useful.
Use in an intelligent auto-bidder can always help.
If I want to win the auction, I use it following the auction and the participants.
If you want to do VP for qualifying, I define the maximum number to use and look that you run out of Tcredit.