A very good boss, but it does have a couple problems. For one he's way too fast for Demon's Souls, this fight would definitely benefit from omnidirectional rolling or even Bloodborne dodging. And second, I think a lot of his move-set relies on very fast reaction dodges which alienates a lot of people. I prefer bosses with moves that require you to figure out the best strategy rather than react as quickly as possible. I actually think engaging with Allant asks more from you as a player than most Dark Souls 3 bosses. Lastly the AOE spam is a little much. So yeah, Penetrator is my favorite boss in this game.