Frenzied momentum set -
2 items - While Momentum is active, casting Stamina abilities while in combat generates a stack of Frenzied Momentum for 20 seconds, increasing....
This is wrong, it doesnt work - when Momentum is active before you engage the combat, stacks dont apply after you go into combat.
You need to reapply Momentum AFTER you join combat for stacks to start applying. If you engage into combat with Momentum ALREADY ACTIVE, the stacks dont apply.
You need to reapply Momentum AFTER engaging new target in combat, otherwise stacks dont apply.
When you are in combat, and you apply Momentum, stacks apply. When leaving combat, and Mometum is STILL active, or being reapplied, engaging in new combat stacks dont apply. Momentum needs to be reapplied for stacks to start applying.
This is not what tooltip states, respectively.