http://www.thesilversandbox.net/p1999/main.php
On the spells/skills/spets tag, go to SK, then Class Guide (lots of info). The website is horrible in terms of font and color, but a lot of good info there.
Under Resources, there is also an Shadowknight Guide (Usefull for all plate classes) Has info on weapons and armor.
Darkforge is pretty great tanking armor, probably best you can get til you go planar.