Yuu☆Yuu☆Hakusho, Rekka no Honoo Recommendations
Both of these series deal with the supernatural and the adventures of a young boy becoming stronger and having strong supernatural and human allies with them in their journeys.
Flame of Recca reminded me of Yu Yu Hakusho instantly. The two have so much in common. Both the main characters are like exactly the same. They're both unbeatable guys in their schools who come into a great power. Both Yusuke and Recca can be rediculously funny and stupid but can completely bring it during a fight. Doron and Kuwabara and nearly identical and Tokiya and Hiei are very similar. The story lines are also very, very similar to each other. Both stories deal like the supernatural and both have large turnaments dealing with humans and inhuman beings alike. If you like one, I
Similar fighting series with a supernatural-superpower angle, similar protagonists and supporting casts and even plot structures (gotta love those tournament arcs).