Completely depends on your dungeoneering level, which floors you're leeching, and how good you're team is.
If you're over 80 dung, doing large c6's under 20 mins each, i'd ballpark it around 5-6 hours.
What are your combat stats? And what gear are you using?
ok thanks i pretty much only botted until just recently so i didnt know all that lol but yeah im 90 dung how much should I pay per floor for ur above figures?

