archbishop lucille changes is not so much as a buff but rather to ensure that she won't be too OP when paired with kahuna (resulting in a huge trigger attack fest). even sienna's passive was change so that it won't be too strong with kahuna. in the right team, the old archbishop passive is strong and i prefer the old passive over the new one.
back to your query, i think inquisitor is better if you want healing passive, same goes for luthor. but do you really need 2 healers? unless you are putting luthor in front to heal the front row, having 2 healers at the back is a huge over kill. better to run a more offensive oriented cleric like kahuna or witch doctor if you already have a guardian up in the front.
I really like how you deal this with the Kahuna inclusion! Im also thinking of the triggerfest team atm and hopefully, this would be good.