I did a pug where everyone but the healers was at least i90. The healers just couldn't keep up. I'd like to agree with a higher ilvl requirement, but it's easy enough to cheat that either by wearing at least one really high ilvl item to balance against a low level item; or by wearing another job's accessory. Unless they change the way ilvl is calculated, it probably wouldn't make much of a difference. Party Finder or running with your FC or a static is the way to go. With a full FC group we've cleared it each time we've ran it, and that was even with new people in some of them.