but... but... but...

(hidden spoilers) But what an end!!! I faced
the Irenicus-Slayer, without any weapon, wounded and exhausted. My legs didn't run -
maybe because I had no more boots of speed 
-... and died-.
First part (my tactics):
-Kensai/mage: potion of strenght 22 and buffed -> THACO-6 with the sword of greed (don't remember its name. I achieved it by control necklace-cheating), THACO -8 with SoM and AC -10/-12.
Main spells: 2 timestop, 1 spell immunity, 1 breach (it's worth more than one), 2 summon undead (skeleton warriors), 1 simulacrum (don't needed, indeed), 1 true sight. Ring of Gaxx -> improved haste.
-Aerie: spells: breach, summon undead and skull trap or spell sequencer (3 magic missile), plus buffing spells.
-Wizard slayer/thief (main char): potion of strenght 22 and buffed. Don't know the THACO nor the AC. Brandished the Celestial Fury (5 stars).
Strategy:
Before calling Irenicus: put two traps (this is cool

) to kill the shadows (oh dear) that are summoned when Irenicus appears. Two traps more near the corridor of the dragon.
Casted 2 skeleton warriors and sent them to the corridor of the beholder.
Casted spell immunity->necromancy (I casted it with the simmulacrum too. This spell gave him
immunity against level draining, I think).
All the buffs casted before calling Irenicus.
After the battle begins:
All the characters run to the dragon, while the skeletons slowed down the beholder. As soon I had the dragon ("injured") in sight, casted a breach (Aerie) and a timestop. While in timestop, the kensai run to the dragon and blowed him a bit, used the Ring of Gaxx's improved haste, blowed again, used kai (I didn't casted the spells one after the other to avoid the delay between spells) and finished the dragon. I think the breach did not its work, because the first blows did no damage. Now the kensai had 25 strenght (because of the sword). I used the remaining timestop to cast a skull trap on the Sword of Greed, which was coming.
The skull trap left the Sword "injured", and Aerie finished it with the spell sequencer (3mm).
The kensai casted the second timestop, run to the Wraith of Wrath and finished him using the same tactic as that against the dragon.
Aerie casted a Deva (an skeleton warrior could have done the same) that maintained Irenicus amused for a while.
The kensai and the main run to the beholder (it was near the stairs, stopped by an skeleton), and put it to the end easily (the kensai had 45% of magic resistance, and the wizard slayer broke the beholder spell casting).
To finish Irenicus the kensai casted a true sight and 3 breach (one at each moment Irenicus casted protection against magical weapons) and hit him helped by the main character.
And then... (hidden spoiler)
I found myself alone, naked and facing the Slayer... and was slew. I wonder... I'm not hasted -the Slayer is. I'm disarmed-the Slayer is not. So it's not worth to run -I run, in fact
-. So where's the trick? Next time I'll try to punch the Slayer