The anecdotal evidence is clear:  health stacking rapes DPS stacking.  But for giggles, I calculated the life expectancy of an Unclean Beast stacking health items versus an identically specced Unclean Beast stacking DPS items.  At every level, the health UB wins.

For anybody who was on the fence, hopefully this will help convince you that buying as many +health items as possible is really the very best idea.

The scenario is two UBs duking it out to the death.  Both start with full health, full mana.  Both are making full use of abilities.  No fleeing.

Took the following factors into account, among others:

• Base stat increases for leveling
• All impacts from items
• All impacts from spells
• Auto attack damage, mitigated by armor
• Spell damage, not mitigated by armor
• Health
• Health per second
• Armor
• Auto attack damage
• Attack speed
• Lifesteal
• Spell damage

Did not factor in mana limitations, with the assumption that Foul Grasp will only ever be cast twice max and both builds have the mana to do that.

The Furious Blade impact was simplified.  I just assumed that the 30% proc was active 15% of the time.  If anybody has a better way to model Furious Blade impact, let me know.

High level details are below.  If you want to dig in more, I saved it as a Google Spreadsheet.