With the release of "Archfiend Black Skull Dragon", this card has been largely outclassed. Not only does "Archfiend Black Skull Dragon" have less specific Fusion Materials, but it also has several useful monster effects with no major drawbacks. With this in mind, "B. Skull" does offer several useful functions "Archfiend Black Skull Dragon" cannot.
Since this monster lists specific Fusion Materials, "Elemental HERO Prisma" can be used to send either "Summoned Skull" or "Red-Eyes B. Dragon" to the Graveyard with its effect. If there is the other Fusion Material in your Graveyard, "Dragon's Mirror" can be used to easily Summon this card (or "Archfiend Black Skull Dragon").