DAN forever!
I never heard about problems with treatment when you have DAN insurance.
Is better to pay 80-90euro each year, than to have so seriuos problems with health and life.
In this story I see just one problem. Person problem.
He do not want to hear any other opinion, just his own.
It was a problem before, when people (divers) everywhere talking - do not dive deeper your limits (also with impropper gases and equipment).
It was a problem after, when others try to describe any mistakes in this dive, at least as lesson for other divers - he do not wish to hear it.
and one more notice - at the all russian diving forums I always talking:
NEVER HAVE DIVE IN THREE!!!
just one situation could be, when you dive "in three" - two is normal buddies, third - have this dive as solo diver.