As everyone has said, it comes down to whether or not you like leveling. Basically do you want to grind epic quests for random chance items or do you want to grind levels? For me I much prefer grinding levels. The first TR is easy, try out the 2nd TR when you need 4.4 million xp. If you get through that without going crazy then you probably can figure on putting the passive past lives in. As people have stated the +3 to hit from fighter, +3 dmg from monk and +6 spell pen from wizard are outstanding stacking feats. I would also say the sorc +3 evocation dc is also quite nice.