CON: at level 16 most people will have a +6 item, and can often get a +2 tome (giving you 18-20). Other sources for HP are toughness feats (see minos-legens helm ml11), False life items, and shroud HP items. I would say that good Hp on a cleric are in the 300ish range. Depending on your play style, you can make do with less (if you avoid combat or have good ac/saves), or require more (if you love to melee).
WIS: if you are just going to be a heal-bot then you don't need to max wisdom. If you want to be a necro/enchantment focused cleric (for insta-kill, crowd control spells) then you will need as high of a wis as possible. max theoretical wisdom:
18 base
4 Levels
3 Cleric Enhancements
1 Human Adaptabiity
3 Shroud Insight
6 Enhancment Item
(1) Abbot Trinket (very difficult to get, almost impossible for most people)
(3) Alchemical (short duration, most people dont consider this
3 Tome
2 puddle stance (monk)
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