So i was wandering if anyone could provide additional information regarding the 'Proc Abilities' of the 'T4 (Epic) Weapon Quest' rewards. (This question derives from my lack of knowledge regarding game mechanics so sorry in advance

e.g.1:
'Annihilator' Quest rewards 1h weapon (chosen/dok) that has 5% chanse to genearate 45 AP 'on being hit'.
So 'on being hit' means that you take damage or that you could also block/evade/disrupt/parry?
Additionaly, 'on being hit' includes that attackes from all sources(e.g. players autoattack, players skill cast)?
When the weapon ability procs is there a CD for it to proc again (can't see any in the description but still i am curious)?
e.g.2:
'Time to Waagh' Quest rewards 2h weapon (chosen/BO/BG) that has 10% to taunt target 'on hit'.
So 'on hit' means that you do damage or that you could also be blocked/parried?
Additionaly, 'on hit' only relates to the weapon autoattack or the class skill (that require weapons) are included also?
When the weapon ability procs is there a CD and is the weapon 'Taunt' equivalent to the 'Taunt' Skill?
I understand that this questiong is more mechanic related but thanks in advance for any info you can provide.
P.S. I know that the SC and ORVR influence weapons are far better but till then carefull planing is required
