This is a dumb question and I feel dumb for needing to ask it, but I am still unclear on this point after playing Thief for the last little while.
When I engage something, is Treasure Hunter applied on the first hit, or is there no TH until I see the proc message in the chat? I've been playing under the impression that until I see the proc in the chat, I haven't got any TH on the mob yet and keep on my TH+ gear until I see one.
Reading the TH page on thei eems to imply that TH is applied on my first offensive action, so what's the point of the proc message in the chat, if this the case? Or perhaps the wiki is outdated?
TH is applied on your first action like it says. The thing is that every hit has a chance to raise the TH level by one, that is what the proc message is about. For example, if you're wearing full th gear (dagger=1, armlets=2, af3 feet=1, plus job traits=3) your first action puts th7 on the mob. If one of your hits profs th, the message will say 8, indicating th leveled up by 1. So there's no need to keep th gear on after the first action.