Wizard Zedd - Lord Chaos is pretty recognisable - grey-cloaked figure with a horned helm and red glowing eyes. So I imagine if you think you've found him, then you probably have

. To defeat him, you need a certain object - you can't just kick his arse with swords and stuff like you have been all the other monsters you've come across. So, two things - do you remember coming across a level where you really couldn't do anything much except pick up a scroll on the floor and continue down to the next level? Do you remember what was blocking your access to the rest of that level? So you have anything in your inventory now which you think might help with that?
If those vague questions aren't enough, here are some more specific facts...
You need to have obtained [/spoiler]three Ra keys[/spoiler] and
the Master Key
.
You need to go back to
Level Seven (the one above the big-open-area-full-of-undead level)
, aka
"The Tomb of the Firestaff"
.
You need to use
the three Ra keys to let you through the first three doors at the entrance to the level
, then head around the corridors. You will find some other doors (opened by other keys) but those aren't essential...though you may want to get the
Inquisitor
, a very nice
sword, with the best Thrust attack in the game - the upgrade to the Delta Blade
, which is guarded by a couple of
Stone Giants
behind button-operated doors. You will unfortunately have to
kill them in order to get at the sword, which lies in an alcove at the end of that corridor
.
There are a bunch of
scrolls lying around in alcoves
in one section, which will give you some hints about
how to complete the game
.
You may come across dead ends containing
Stone Giants
, but don't worry about this - they
won't activate until you pick up the Firestaff
.
In the
middle of the level
you will find a door [/spoiler]with a black keyhole - this is where you use the Master Key[/spoiler].
Inside you will find
the Firestaff
. As noted a few steps above,
picking it up will activate the Stone Giants, enabling them to start chasing you, but they are the slowest mobs in the game so unless you take about ten minutes to run along the corridor don't worry about 'em

.
That done, you need to go back down to
Level Fourteen (where you fought the Dragon)
and obtain the
Power Gem
. How to do so is suggested in one of the
scrolls you may have read back on Level Seven
, but in case you missed it or something, what you need to do is
cast Zo Kath Ra (you can just do a Lo-level version), which creates a hand-held ball of plasma-stuff. Then click that on the tree-root-looking-things holding the Gem
.
This will enable you to click
the Firestaff on the revealed gem, unlocking its full powers
.
It's worth noting that the
ungemmed Firestaff
gives +1 Wizard level to the wielder (while equipped), while the
gemmed version
grants +2.
You will notice that the
now-gemmed Firestaff
has three attacks -
Invoke, Fluxcage, and Fuse
.
The first of these three
casts a random spell (I think Fireball, Poison Cloud, and Harm Non-Material Being are the possibilities, but it's been a while since I played)
.
The second
creates a Fluxcage in the square in front of you - it won't harm anything that steps into it, but Lord Chaos will actively try to avoid standing in a square which contains one
.
The third
will attempt to fuse four Fluxcages together, if you have cast them in the squares adjacent to an empty square and then step back from the empty square into one of the squares containing a cage
.
I won't go any further than that, since that should be enough for you to gather what you need to do

.
Nym - Yeah, armour is pretty rubbish. I don't really even tend to bother with any of the plate armour because it's so heavy. A few of the necklaces (like the Pendant Feral and the Moonstone) have visible effects, but generally the "weak" armour seems just as good as the "strong" armour. I never bother with shields - my characters keep an empty flask in their off-hands and I have them make potions as and when I need them (so I never need more than two flasks, one for each character, one of whom starts with a flask anyway)

.