Mismagius doesnt have the good defensive stats to be on the list, Gengar holds a similar type advantage over them, but its defense it too low to make an impact. That anem metagross absolutely shreds it.
Magnazone likely would be the best PvP electric type, having better tankiness than Electivire with not much less DPS, and being a lot cheaper than raikou, and having many more resistances.