Shadowknight/cleric duo gear question

[Ele]

AC means the less damage you take the less mana the cleric has to use.
STR will increase your attack and damage caps, so the more the better.
You're an SK so you can keep aggro with disease cloud easily, not need for dex for aggro procs like a warrior does.

Sounds like your gear is fine for lower levels. Just fill out with plate gear as you go along and look for HP/Str gear to fill out the other spots.