An insurance law expert and appellate lawyer who argued a foundational tort reform case to the state’s top court has died.Daniel G. Wills, equity partner at Swanson, Martin & Bell LLP and adjunct professor in appellate advocacy at The John Marshall Law School, died late last week following an illness. He was 59 years old.Colleagues called him a “brilliant” legal writer who went out of his way to mentor young associates on the tools of the trade. His emphasis? Brevity.“Avoiding legalese. Using an …