Divination spells don't get much love in D&D...including DDO. And this is just a crazy brainstorming type idea, but....why not a Detect Monster spell? I've thought of a couple ways it could work:
1) Monsters have a blue aura which can be seen through walls/doors from a small distance away.
2) Mini-map or main-map can have small dots letting you know where monsters are.
3) Map or mini-map has a monster count on it.
This may be a "game-breaker" and hence would not work...but people better at balancing this kind of stuff could work out those type of deals. I could especially see how useful this would be during wilderness slayer quests and to prepare against ambushes. And Divination spells need to be flushed out a bit...there aren't really many.