Redcloak was like level 15 at the time, but he still could probably have gone 1v1 against any member of the order.
Though I think the entire order was mid level? They got two levels in the dungeon, and then they were good enough to be called "already high level" during Roy's death.
In either case, the climax in the Dungeon of Dorukan would have been a slaughter had Xykon been serious. RC might have died if it was him vs the Order, but Xykon alone would have been more than a challenge for them.