Andrew Cochran from I-Gard offers a good article on arc flash mitigation. I-Gard is not a customer of ours but this is a good balanced article focusing on cutting arc flash energies by resistive grounding and other techniques. Mitigation presumes you have an arc flash study but many companies can offer advice on how to build a better system with more protection. Never choose one strategy unless you know it is best for your system.
This gives high level view of three steps.