I would put points out of Safety Zone to max Cure, Heal and Divine Might. At Cleric c2 you have this attribute for Safety Zone that adds up to 20 more hits absorbed. So it leaves you with 28 hits absorbed in 20 seconds duration. I think thats enough.
You could drop Hex/Effigy and go for Bwa Kayiman zombiewalk 
But keep in mind, that there is no zombiewalking without zombies so beware of aoe effects.
Conversion is good enough at level 1 (it only gives you 4 seconds worth of the magic circle initiating the conversion and no bonus to converted minion’s damage, if I see that right).
I would just put one point into Barrier in favor for Resist Elements, as it is enough to keep Barrier up and Resist Elements seems a stronger cooldown to me. If 80 magic def is reason enough for you to sink 4 more points into it, because you want to be more supportive, then keep it 
If you go for Smite, doesn’t matter how much points in it or how much str/dex you have, put at least one point in Conviction! It was buffed in korean version recently to make Smite hit three consecutive times (hidden bonus) with its debuff up (5 seconds i believe). Max Conviction if you want to buff your team’s elemental damage.
Keep in mind, that Restoration buffs your Heal spell (hidden bonus). So maxing it is not a bad idea, especially if you don’t go for int and your mace’s magic attack, max health and Restoration are the only means to buff your Heal spell.
Think about giving up one rank Bokor or Paladin for Plague doctor, as this class offers good damage AND support/healing AND has good synergy with Paladin and Bokor BOTH! (Pandemic for spreading Hex to Effigy multiple targets and spreading Conviction for dps support. Conviction to strengthen Incineration).