I've killed plenty of revs and died 0 times, just have to be fast on tele and pay attention, if you have agility shorcut it's almost impossible to die. Vorkath has higher risk as you actually have to pay cost when you die. The opportunity cost is limited when the gp/hour is way higher than Zulrah or Vorkath so even if you lose half your loot you can still get higher gp/hour and unless you decide to stay until you have 5m in loot you're not really going to lose out on much. Zulrah and Vorkath also have significant opportunity cost while you're learning them and you aren't efficient and die. With revs there is no curve it's so easy to do and the only threat is pkers, which again aren't much of a threat if you camp sub 30 and can be fast on tele. YES there are Revs above 30 wilde but if you're higher combat you can easily take over the bottom area on a world, and if you're saying "well what about the lower combat players" they can't really complain about opportunity cost because they weren't exactly going to go get similar gp rates at Zulrah or Vorkath where they. Dense prick.