This loadout is amazing for any enemy team with deployables and personal shields. I'd still recommend some Wrecker for a Nando or Koa, but for Inara, Azaan, Barik, Grohk, Ying, or any combination of those this loadout is amazing!
To begin make sure you start with Deft Hands 2 - minimum. Beyond that each item is situational and depends on your in-match needs at the time.
The key to this build is to always know where to plant your right click to melt deplyoables.
Ride the Rocket
Increase the base damage done to Shield and Deployables by your Cluster Grenade's explosions by 80.
Heal for 30 for each use of Explosive Personality.
Reduce the Cooldown of Cluster Grenade by 0.4s for each enemy hit by the initial and secondary explosions.
From Betty with Love
Increase the explosion radius of Cluster Grenade's initial explosion by 24%.
Hail of Bombs
Increase the explosion radius of Hail of Bombs' explosives by 20%.
Increase your Reload Speed by 40%.
By "weak", I just mean these folks can counter you pretty easily if you're not careful. Cassie and Andro are the only two that legit "counter" Betty if you have any sense of positioning or map awareness.