Let's Build: the ultimate dungeon-crawler

[Propsken]

While the title is rather self-explanatory, I'll elaborate a bit, just to be clear: I want to know what your opinions are in as far as must-have races/class-abilities/feats/spells/items for dungeon-crawling are concerned, plus the justification for your choice(s). Complete character builds not required. All things considered, let's stick with official products, a single character, standard rules (WBL for example) and limit ourselves to level 13.

[Tiny Coffee Golem]

Urban ranger (for the BAB and trapfinding) with a high perception, ring of telekinesis, Ring of regeneration, and boots of teleport.

Find traps, set things off at a distance+lots of opportunity to damage stuff, Healing, And in the event he/she gets in over his/her head teleport far far away.