The spell trigger gems do not scale properly with bosses armor or resist from a 6 player game from what I've experienced. Ive dedicated almost 1000+ hours into this game And after playing 12 different specs from various classes my opinion for thee best class(note soloing 150 dungeons on elite by yourself are nothing without trying them in a 6 player game on elite where mobs have HUGE increase to their health, HUGE HUGE HUGE armor(my berserker crits for 150k in solo game, crits for 8k in 6 player game),and damage) The best class and spec and build in the game is a Spell trigger outlander focused on stacking DR%, health, and Int.