Since you asked about "Cleric stuff"
One of the characters in my game is a relatively young Cleric from a Hive Tarsus noble family (House Kim, known for having their fingers in governmental pies). She is a bit of a "black sheep" of the family and embarrased her family a few too many times with her party-girl antics and found herself shipped off to the Vulpine Chantry to become a priestess of the Imperial Cult (and get her out of their hair). Unfortunately for her parents, the Vulpine Chantry of Tarsus (the one willing to take her in) is largely the dumping ground of spoiled nobles and she really didn't much get cured of her party instincts.
What this means in game terms is that the player sacrificed a healthy chunk of combat potential for the character but got a nice fat bonus to social abilities in exchange (noble origin plus Chantries of Tarsus starting package). She currently has a Fel 63 and still has one advance left open to her. Given the character's back-story I allowed the player to take both Carouse skill and the Decadence talent as "at cost" elite advances during character creation (both appear a bit farther down in the Cleric's advance tree, I simply authorised buying them early). She is still fairly useless in melee (might change soon since she is now up to a WS31 and S30) but has been finding ways to get better at ranged combat when forced to fight (she has discovered flamers and the longlas and is up to a BS35). If she finds herself in a situation where she really has nothing to contribute with muscle power and trigger pulls she has been known to start shouting out prayers to help bolster the team (Master Orator, Air of Authority). Under certain circumstances I use this as justification to grant bonuses to her teammates trying to shake off a fear effect or similar maladies, plus it is just cool.
There is also the benefit on certain investigations and undercover situations. She is 1.65m and 55kg and has wildly dyed hair (currently pink and green stripes with red tips) and will enthusiastically drink darn near anything put in front of her, sample drug offerings and so on.... And just keep going! Combine this with the correct outfit and pretty much NO ONE thinks "Hey, this must be an Imperial Cleric in service to the Inquisition." She gathers some interesting information to say the least...
Just another take on the very flexable Cleric career. They may not be the best at doing something, but they can darn well do anything "pretty well" and make for some rather interesting specialists if focused. Charismatic leader, frothing lunatic with a chainsaw, James Bond style espionage specialist, some hybrid of all three? Such things are all possible in service to the Church, Emperor be praised!