Keldorn may not cast clerical spells, being an Inquisitor.
The Imp. Haste from ring of Gaxx lasts no more than 1 round,
and it can be cast only on himself IIRC.
And I think a mage can cast deathspell to unsummon the Deva.
Anyway with the Deva I'd consider things no more fair.
The challenge was against that "particular" Keldorn, who appears
to have focalized on other abilities.
Anyway.
@Glod:
As I said, we have to know what we are against.
If he uses the Cloak, I'd want the Staff, using it to become
invisible at will...
The cloak is just TOO powerful.
If he's taken WITHOUT the cloak, not only we could kill him
without the Staff, we could do ENTIRELY without items.
Not even the Robe.
About the swords, of course a Project Image would be enough,
the problem is the time, as maze lasts 3-12 rounds.
In the worst case, we have to retreat. 3 swords won't block him.
In the average case, he's dead. 5 swords are enough.
He has not a really great AC, and we can haste them up to five or six
times..
If he stops to dispel haste once, he can't quaff a potion.
I killed Balor with just TWO swords. No problem.
I'm quite sure 5 Swords would win.
About the dual.
The dual has no need of 9th level spells.
Melee is enough, aided with FAST spells or triggers.
I've played a lot with a Kensai/Mage, many here knows how much
I posted about that.....
I assure you, there would be really no problem.
No need for specific preparations, I'd use the normal spell
configuration.
It would be handy to be level 16 as a mage, so that you already
have spell trigger (Imp. Haste, Mislead, Tenser, if he stops
to dispel those you HEAL anyway....) but we can do without it.
A Kensai/Mage level 12/14 is MORE than enough.