Cleric leveling - balancing AC/HP and WIS

[Vexenu]

Looking for thoughts on the ideal balance for leveling purposes. How effective is stacking AC/HP on a Cleric for survivability? Is there a worn cap on Cleric AC that makes it not as effective as stacking AC on a melee? (I remember a thread on this but can't find it). I guess another way to think about this question would be, "When the shit hits the fan as a Cleric, am I better off having relatively high AC/HP with a lower mana pool, or a higher mana pool with noticeably less tankiness?" Is it more often that a wipe/death is prevented by the Cleric being able to survive himself through AC/HP? Or does the deeper mana pool end up saving you/others more often by being able to get off a couple extra heals/roots when shit really goes south?

I am biased toward tankiness at the moment, my idea being to shoot for as near 200 WIS as possible while stacking AC/HP in as many slots as I can. But I'm curious to hear others' thoughts on the ideal balance.