Imho spoken like someone who never pvped. The only time you get your 3s stun off is it's 1vs1. Also sages are way less popular then sorcs so you have to deal with much less cc. Every class can cc and deal damage afterwards, sentinels and marauders are the only one that can't. Hardly balanced.
I say take away the 99% damage reduction buff, because it's just lame especially on a class that's supposed to be top dps with 3 dps trees, and give a 3-4s 10m ranged stun. Also a passive low in the tree, so any spec can take it, that you're immune to knockback and root for like 4s after force jump.