i didnt test the new inscription maybe its a bugg but maybe its not
i read a post once in gw2guru from keops :
“Sigil of Superior Agony always seems weak to me when I compare to the +50% bleed the Warrior has access to.
Furthermore, if you already have +10% condition time from traits, is the +10% from the Sigil useful at all?
I read that Bleeds and other conditions that tick are rounded up.
So if you have 3s bleed +10% that’s 3.3s. So it will create 4 ticks.
If you have a 3s bleed +20%, that’s 3.6s. That would also be 4 ticks."
i hope it helps