After ascending the High Peak and having sometime some problems (9 floors and each one has a unique with random abilities that can then be very strong), i finally reached the sorcerers sanctum.
It was an incredibly hard battle with my berzerker i really had a though time reaching those fleeing sorcerers.
I thought i had lot of hard boss battle before, but this one was even more difficult : each sorcerer have at least 15000 health (sometime more due to the randomness), minimum of 40% resist in nearly everything (and due to randomness, they can easily have several 90% of resist to every kind of damage).
I save scummed a bit before getting a possible to win setup (as in the sorcerers didn't have 95% of resistance to -every- damages i could do, as the randomness did really that 3 time !) but even there was a lot of luck involved as there were many near-death situation i escaped only with a teleport to the other side of the sanctum.
And if it was not enough, there was a continuous flow of summons coming out of 4 portals, plain crazy as the sorcerers were sometime behind the bunch of summons, making my character life even more difficult.
Even worse : too often one of the summon that one of those monsters that have the disarm ability, basically they were regularly crippling completely my berzerker attack possibilities when i really needed my best death dance damage to bring down the insane amount of health of the sorcerer (helped by their very high resistances).
After my victory i understood why i found this battle so insanely hard :
So it was possible to close those portals ? Arghhhh if only i have understood this, there wouldn't have been that save scumming thing to get back to the floor before the sorcerer sanctum with getting the game over (as i was out of extra lifes since a lot of time).
After exploring the room a bit i noticed the portals have the same names as the orb of command, so i guess using them on their corresponding portal was closing them.
Wish i knew that, as it really made the battle nearly impossible (especially with the Sun Paladin leader coming to help you being always killed early, surrounded by so many monsters).
There are a few portals that opened in the sanctum, but after all the tension of that victory, i'll try them another day.