Atypical Recommendation Writers

I am currently working at a boutique law firm supporting eight attorneys and their paralegals. Since our firm is small and close-knit I've been able to work closely with every team member in various aspects. Any thoughts on a rec. letter written on behalf of all the attorneys or is it best to only have it written from one attorney? I already have two traditional letters but am hoping to have a powerful third. Thanks for your insight!