I'm farming Bakura on LVL 40 with this deck, with 100% win rate. It is a modified Halo King deck. You don't need the Gravedigger Ghoul with this, because Bakura won't last more than 2 rounds.
Score is around 5000 if the BEUD attack is successful, which has a 50% probability in 5 rounds. Which means a 4K average score, which is nice on LVL 40. Always do an attack before it because Bakura won't use his Kuriboh unless the attack is deadly or if it would destroy a monster. I just beated LVL 50 with it, and even made a mistake. (Because the King Halo deck needs a strange way of thinking.)
man 4000 assessment is way too low for such an expensive build, i get almost always 4000 with odion chain reaction full trap deck (i'm a f2p player fyi)