Then we can give a set effect that can compare to an exotic or slightly below an exotic performance wise like a small reload speed bonus for all weapons, or a noticeable reload speed bonus for a certain weapon type. Have set effects be more useful the more pieces you have of that set. Like doubling effects of buffs on you as well as debuffs inflicted on you. Another one could be doubling the time buffs are on you as well as debuffs on you. It increases kill potential while having a nasty drawback of working against you like having suppressor grenade last longer on you than others not having the set effect. Risk and reward. Bungie seems to love tradeoffs so i threw some in.