I have placed it at the fifth place myself, although in hindsight I think this might be slightly too high
Similar to other Dark Magician decks, this build relies on summoning Dark Magician early (Magicians Souls, Eternal Soul) and acquiring necessary Spell cards (Magicians Rod) to either do a special summon with banishment (Dark Magic Circle) or even backline destructions (Dark Magic Attack)
Games are often won or lost on the back of good and bad variance and the ability to cast your commander after one too many boardwipes
Shadowheart, Dark Justiciar Compare this to Ayara
Bushy Bodyguard To me, Bushy Bodyguard is more useful when you have more mana to pump into it and its offspring
Similarly, if a spell is cast without paying its mana cost, but the player did pay mana for additional costs such as from kicker or from Thorn of Amethyst, Boromir's second ability won't trigger and won't counter that spell