If you want to work specifically on jerks you've got three main options
1. Jerk from racks and lower the weight yourself which can get hairy when you get north of 85% of your best jerk.
2. Jerk from racks and get lower downs from 2 training partners who are both A. roughly your height, B. Strongish, C. reliable and trustworthy
3. High jerk boxes that let you drop the bar from the overhead position and allow you to do repeated jerks without the need to reclean each time.
In our gym we use option 2 but repeated 95% jerks are going to count as one of my least favourite exercises to spot or be spotted on. One slip, one miscommunication and the lifter can cop it badly. Snatch balance is perhaps even worse and i've been the victim of some doffus turning away to answer his phone and dropping the bar on me that way.