I use leaders with braid 99% of the time. I'm doing what I feel is necessary to get more bites...I use leaders rated heavier than whatever's on the reel, also 99% of the time. On my lightest Spinning Reel there is 6 lb. Sufix green braid, and I use Seaguar AbrazX 8 lb. leaders with that. My favorite Inland Saltwater Spinning Reel has 10 lb Sufix green braid and that gets either 15 lb. or 20 lb. mono (30 lb. mono, rarely) or 20 lb. AbrazX leaders. I also make my leaders kind of long, upwards of 3'-4' (all of them), this way I can retie a few times before I have to replace the entire leader...and longer leaders get the swivel (if used) and braid a little further away from the bait.