How would you feel if its absorption limit were changed to break once it prevents X damage to any given player in it, rather than X total damage (among all players in it)?
I think that's what I'd want to see. Still prevents 75% damage on a huge burst, and while it may still last reasonably short under AoE dots/pulses, it could be up to 10-25x longer if say it prevented over 100k per person... maybe the threshold could be lowered if needed.