I wouldn't consider feeding every 5 days to be power feeding. Usually thats like every 2 or 3 days. The only concern with power feeding is that the snake will fast for large parts of the season because it is being fed so much.

Don't rush into breeding. If you need to power feed your snakes to get them up to breeding weight by this season, maybe you should just hold off until next season. By then they will be a great weight and will likely produce bigger and healthier clutches.