What is the up-time on CC's? What is the up-time on Barrier? Don't answer, I don't want a headache.
Barrier up-time has already been discussed by me here: TL:DR, it varies per build. I've already mentioned what the up-time for CC is.
ranged enemies in the Static Cage
Veilstrike --> KD + Sleep. See build in signature.
Despair Demons vulnerable to paralyze as well, just approach them and they're scripted to attempt to move and subsequently be paralyzed.
Ele Response: Fire Wall Panic --> Chaotic Fire Mine, dead Despair demon.
just some arcane guy.
I like my arcane guys! Either way, both statements are opinion and irrelevant.
enemies randomly proccing auto-upright ability
Can you explain this?
CC... is ... temporary damage mitigation
CC is not mitigation. It is prevention all together, because you do not take damage. Barrier is mitigation, because it assumes you are taking damage to begin with.
cannot possibly affect all enemies in all encounters
As stated before, there is exactly only one enemy that cannot be directly disabled by CC. One, the DC. I challenge anyone to name another enemy that cannot be disabled, and I'll reply how.. Before anyone says Revenent: Disruption Field / Stasis Lock.
limited duration and usually significantly higher cool-down times than said duration, positional casting issues
Uptime and effectiveness better than barrier, whose effectiveness decays over time. Positional casting also simpler to deal with than Barrier due to not requiring three others to wait for you.
second to last line of defense, whereas Barrier is both the first and last line of defense
CC works before Barrier does, however Health is the last line of defense (not barrier). For warriors, Guard before Health.