It’s one of the reasons why i’m ONLY playing with BB’s I want to, and not being forced into too many of these challenges just for a trophy. Some of the BB’s have VERY easy ones, others have really poorly thought up ones. Has taken me a long time to get Thorn’s Volley jump kills. Took away the fun for me.
Best of luck, hopefully some of the tips here will help. And hopefully when the game gets it’s first full update with the DLC most of the lore challenges will be fair.
