Test Environment: Warlock Dawnblade (Solar) Attunement of Grace (Mid) using [url=https://braytech.org/inspect/item/614426548?sockets=263649945/3666208348/269888150/1749209109/1685431615/4248210736/1513326571/1486919759/2931483505/2285418970]Falling Guillotine[/url] in The Tribute Hall, target Simulated Hobgoblin (Vex). Test Result: Basic damage: [url=https://user-images.githubusercontent.com/18349191/91651577-0e6f8a00-eac1-11ea-9d92-c334f2d2b1e5.png]12,035[/url] Basic damage + Well of Radiance(+25%): [url=https://user-images.githubusercontent.com/18349191/91651597-52628f00-eac1-11ea-8ae1-1931de7c2a46.png]15,044 (as expect)[/url] Basic damage + Lucent Blade(Keened)(+35%): [url=https://user-images.githubusercontent.com/18349191/91651642-b5542600-eac1-11ea-9343-f78cf7d50905.png]16,247 (as expect)[/url] Basic damage + Well of Radiance(+25%) + Lucent Blade(Keened)(+35%): [url=https://user-images.githubusercontent.com/18349191/91651722-a8840200-eac2-11ea-8655-369b03d08718.png]15,044 ([b]unexpect result[/b])[/url] However, according to [url=https://www.bungie.net/en/Explore/Detail/Update/48198]Update 2.6.0.1 Post[/url], [1] and [2]. If we don't treat Lucent Blade(Keened) as a [b]single weapon buffs[/b] [3], we should expect 16,247 damage([b]The highest applicable bonus +35%[/b]). When we do, it should be stacked multiplicatively and make 20,309 damage. Is it a bug or just designed as it is? References: [1] [quote]Bonus damage effects that apply to all of a player's weapons simultaneously no longer stack multiplicatively. [b]The highest applicable bonus[/b] will be used instead[/quote] [2] [quote]This [b]does not affect single weapon buffs[/b] such as Rampage, Kill Clip, or exotic weapons that increase their own damage. These will still stack multiplicatively.[/quote] [3] [quote]While Charged with Light, dealing damage with a Sword gives you [b]bonus Sword damage[/b] for 5 seconds, consuming one stack of Charged with Light.[/quote]