First, a Clostridial vaccine. Covexin 8 protects against 8 species of organisms of the genus Clostridium. Among them is blackleg and tetanus.
Second, fetal protection. A fetal protection vaccine will protect your herd from IBR, BVD (Types 1 and 2), PI3, and BRSV viruses. Most fetal protection vaccines can be had with an L5 component. L5 is the 5 Leptospira organisms. You can also get it with vibrio and Mannheimia haemolytica components. I use Bovi-Shield Gold FP 5 VL5. That is a modified live virus preparation and should not be used on pregnant cows or calves nursing cows if the cows have not been previously exposed to a MLV preparation for the FP 5 viruses. Assuming yours have not, you could use Cattlemaster Gold FP 5 L5 which can be given to pregnant cows.
Those two vaccines are the foundation for a cow/calf operation. If you have pinkeye, anaplasmosis or other issues in your area, check with a local vet and employ vaccines to address those issues.
Fundamentally, my program employs two core vaccines, one for Clostridials and one to provide fetal protection as follows:
1. Covexin 8
2. Bovi-Shield Gold FP 5 VL5 if your cattle have not been exposed to a MLV vaccine, you could substitute Cattlemaster Gold FP 5 L5.
PS: I would suggest a parasiticide. I prefer injectable. I do not use generics. Studies reveal they are not as effective.
PS2: from one Kentuckian to another, anaplasmosis is becoming a big scare. Guy right here just lost three cows, his bull had it too but is responding to Chlortetracycline.