Experience total on P5 is 300% vs P8 which is 450%.
TZ XP ranking from roneye:
https://forums.d2jsp.org/topic.php?t=102738008&f=148Goal isn't to full clear, but to hit the champ, elite, and super elite packs when going through each area.
Everyone does tombs repeatedly because it is the most efficient but doing other areas will work.