You're right Aldriana I screwed the modifications cause I changed the AX column and not the B.
Now everything works right and i'm going from 11457,7 to 11530,3 when i equip HP instead of H:twin, nice change. Happy i hot this dagger somewhere in my bank waiting an eventual boost of the proc.
The Invigoration buff from melee attacks using the Heartpierce dagger will now grant twice as much resources as before. It now grants 2 rage, 4 energy, or 120 mana every 2 seconds for 10 seconds.