It says they "Increases your affinity with (class)-based actions by 10, up to a maximum of 100."
Does this mean that they make your skills stronger while you are that class or that they make the skills better when you use them as cross class skills?"
The reason I think Its for cross class usage is because when you try to equip a weapon on your off hand it says
"Unable to equip. Either your primary skill or item affinity is not high enough."
So... anyone have these abilities yet and can shed some light?