My wife and I are semi-casual Runescapers. We were doing iron/steel dragons today, and she said while it was fun, the monsters took too long to kill. Note that she's only 77/77/77 for combat stats, so things do take a while. (I'm max melee, but that doesn't help her!)
What I like about steel dragons is that you're completely safe/protected, and that you don't have to bank very often. I'm looking for a monster that would be lower level than iron dragons, but still provide a safe environment, decent drops, and significant length of time (30-60 minutes) between each banking.
If this exists, where can I find this?