Jaguar HP skills + %HP gear + HB

Has anyone done any testing with the following skills? What I'm most curious about is:

- Jaguar +40% HP and %HP equips e.g. Rex earrings

- Jaguar +40% HP and 60% HB

- Jaguar +40% HP + +80% bezerk skill

- Jaguar +40% HP + +80% bezerk skill + HB

etc. Someone told me the bezerk skill + HB cancel out. Does order matter? (For example, the order matters for the green HP potion)

They should just add normally for the first 3 cases... 50%, 100%, and 120% respectively. Berserk and HB should cancel, same as Conversion and HB for BMages. The new one cancels the older one's bonus.

Jaguar HP boost stacks with everything.
%HP items stack with everything.

Berserk and HB should cancel, not sure.