One thing I've noticed is that sleep is prevalent in lower level dungeons maybe because new players see the skill that they just acquired and they think they need to use it and this mentality carries all the way over to the end game? For my last 3 Qarn runs on my summoner, I tried using bane to spread my dots and in all cases it turned out to be a bad idea. It seems many tanks at lower levels seem to just flash/overpower once and focus on "1" target. So yeah its quite frustrating for me cause my dps as a summoner is severely hampered when I can't spread my dots around.

On a more positive note, one of my proudest moments as a blm was when running WP with my fc and the tank gathered up all the mobs from the start to the first boss and I proceeded to pop RS and mega int pot with triple flare and they died in about 10 secs. Good times :P