Before you go Bold, consider Adamant:
Hold: Sitrus Berry
Adamant Nature
Ability: Unburden
Moves: Belly Drum, Drain Punch, PLay Rough, Cotton Guard
Belly Drum maxes Att, Sitrus berry restores 25% of your Hp right away, as you know Unburden doubles your speed and Drain Punch restores your Hp, even against opponents it's not very effective against. And Cotton Guard to boost your defense on turns you think you can pull it off. Honestly, this thing is a monster and I just love it! Either way, I have a HA Swirlix I could breed for you, just not today unfortunately, but Monday if that works for you.