base pop in tier 1 zones should be simple mobs with easy pulls, mild abilities, low hp and low damage. base pop in final tier zones should be difficult mobs with hard pulls, highly threatening abilities and high hp/damage. I really loved that Veeshan's Peak in RoS was not just time consuming to get into, but also a real threat all the way through. I was hugely disappointed in Mearatas being a loot pinata. Meanwhile Stratos is arguably the most challenging zone in TBL.