Remember the Lightbearer Knights that came with the Witch Queen expansion? Enemies that could wield the Light and go toe-to-toe against Guardians in a way that made sense? These are the enemies that should have replaced Champions if you wanted to have mini-boss enemies. In the lead-up to the Witch Queen, these Lightbearers seemed to be a unique threat that would shake up the game, but they turned out to be disappointingly easy to deal with. But it doesn't have to be that way. They still exist only in Savathun's Throne World but reasons for them to appear anywhere could be established. They are usually interesting to fight and you don't need any particular mod to do it. They just need more development and tuning to make them a big challenge whenever they appear on the battlefield. These knights could be made tougher or spawn with different buffs or variations on their powers so you were always kept guessing. But nope, we have Champions.