What do you guys think of this one? Maybe it is a tad too powerful, but just a thought. I could reduce the bonus to intimidate and sense motive, but it is only useful in combat, but I could see that changing.
Dreaded Slayer:
Inquisitor instead uses charisma instead of wisdom for all of her spells and class abilities. This includes the base stat for save DCs and additional spells per day.
Reputation of Ruthlessness (Su): More active in killing villains or monsters you have become feared and renowned among some your enemies. This has left an imprint on your soul and has granted her a greater a greater insight into their individuals, granting you a bonus on intimidate and sense motives skill checks equal to 1/2 their inquisitor's level +1 (requiring attack rolls to kill a target). If the inquisitor possess a weapon that has the bane effect and the target of their intimidate or sense motive checks is of the same type of the bane weapon, double the bonus gain by this ability.