Well, the list was an order for it to count as a past life. With a group, it should be fairly easy for at least one person to always have a splash of rogue in their build to get the traps and such while still keeping their primary class for TR purposes.
The list I presented was mostly a "here's the best guess so that every life gets something from past lives" but honestly, the bonuses from each past life are relatively minor and so the order isn't critical.