Any objection to Dirk entering the Church Inquisitor PrC? I think it fits his theme pretty well (he's a snitch, infiltrator, spy, etc, for the Watch, at least in his background). The prereqs technically say you have to worship a LG deity, though, and he is LN and Rebukes. Otherwise, he meets the mechanical prereqs.
Edit: Assuming that's OK, he's leveled up except for purchasing gear. For that, I'll definitely be getting a Wand of Lesser Vigor and maybe a Healing Belt.