I’ve noticed when I get multiple stacks of a buff that my stats don’t change.
This image shows how my stats appear at the very beginning of the Delve.
Here are the stats when the Kaja is not touched:
https://gyazo.com/fea4521ca7e0f47bf6bf92e2eda0f418
When the buffs are active, here are my stats now:
https://gyazo.com/c12c161daadab706db91a36d16963644
Despite how each one gives a 4% increase, they instead give less than 1% each. I’ve had instances where my 6 stacks of Critical Strike only gives me around 3% in total and not the expected 24%.