I have been trying the specialized tool widget to track my Corrupted Mantle and I find it hard to see when it times out. I think that if it was like the Abnormality widget and had an option so it disappeared once it deactivates, it would be a lot easier to track since I have no issue knowing exactly when Might Seed/Powder end during combat.
#Hide specialized tool widget when not active
calm ferry
steady canopy
Coincidentally v2.13 introduces a new specialized tool widget design and options, I can add that settings for this next release