I managed it plenty of times.
Also died plenty of times on a squishy mage.
I speak about this change from the perspective of a guild.
My mages even my alts that are only for COTH purposes can survive long enough to either coth my tank OR die just outside of agro range which is still in range of my fighter guild clicky rez.
That's fine and dandy if you're an uber twinker... but I don't think this is an answer for the average player. In the natural progression of this server, you would not have that would clicky rez yet.
NPC casting COTH, sounds good to me. Though, it might be just as easy to fix the code as to implement that.