Well calf liver has significantly more nutrients than chicken liver, so you are already better off than if you were just feeding chicken liver. Something like beef kidney has around 518% of the recommended daily amount of vitamin B12 in just 4 ounces, but then your calf liver has 279% in just 1 ounce!
However, beef kidney does have a much higher level of Riboflavin (which I have never heard of before now, but is apparently vitamin B2).
Honestly, I don't know exactly what you might need to add, or not, but I can tell you that you diet seems more balanced than a lot of the commercial diets I have seen which also only have liver (and claim to be AAFCO balanced). That calf liver covers your vitamins A and B12 really nicely. Maybe try plugging in your whole diet on a nutritional data site and see what might be missing?