As a Mage u can’t blink while silenced, if there is a stun also added you can blink even though the silence is still active, this applies to all silences used in PvP combat atleast based on my personal experience. Not sure if it’s supposed to be like that or not in Vanilla but i’ve always played mage myself and remember it not being like that in endgame TBC or WOTLK.
Määzi 60 Mage
Mograine-EU