Picked up some Inquisition Units

Hey, so I won an ebay auction for a 'Witch Hunter and Retinue' box, as well as a 'Inquisitor Coteaz and Retinue' box. It seems like some of the units no longer are canon / have crunch (like the sisters hospitaleer). Does anyone else have these boxes and could comment on usefulness? I picked them up more as a collector who got a good price, but I do also play the game (not super competively).

I have a huge raven guard army, a pretty good skitarii / admech army, and the four assassins. How would you guys / gals recommend using the Inquisition? I have an extra Rhino I could repaint if it's worth it, and also have a bunch of servo skulls.