i could say add ancient rules but that depens on how often do you draw dark magician,swing of memories could help here since you have a good number of normal monsters so you could use swing of memories for synch/xyz,by the combo you pull with prisma,you could add a dark erradicator warlock,and maybe,in turn, sorcerer of dark magic,chaos sorcerer could be good there,and could combo with resonance device,for easy rank 4/6/7 xyz summon,and in turn,addtion chaos would allow you for locomotion r-genex
thats all i can think of now,since im a little tired,i'll check later which cards could you replace with the ones i mentiones,if you like my ideas of course