[armakh]

The only problem with detect secrets is that it doesn't last for very long, so it uses up a ton of mana. In the early game, my bishop uses mental magic mana faster than any other because of insanity and ID-both great spells to build up skills. If you've been through the game once already, you should be able to remember where some of the more important things are hidden. If not, then I'd suggest keeping a ranger.