The cooldown doesn't matter, what matters is that the first time it pops, it absorbs hundreds of damage from any DoT or late damage and gives a big damage buff to turn the tide.
I'm sure everyone knows just how many builds use the cleric robe, some don't even think about it since it's just so much value into one item. It provides immunity to burst or to finishers, it enables burst and finishers, it enables resetting from almost dead to full hp cause of healing bonus, it makes escaping after a
too easy, it allows for target execution even while being hit. It's just too many things in one
Idea: Remove the bonus damage completely, healing bonus can stay (since it's a "cleric" robe)
It should be a choice between damage immunity (proposed cleric robe) and damage bonus (druid, royal), not both in a neat bundle.
I'm sure everyone knows just how many builds use the cleric robe, some don't even think about it since it's just so much value into one item. It provides immunity to burst or to finishers, it enables burst and finishers, it enables resetting from almost dead to full hp cause of healing bonus, it makes escaping after a

Idea: Remove the bonus damage completely, healing bonus can stay (since it's a "cleric" robe)
It should be a choice between damage immunity (proposed cleric robe) and damage bonus (druid, royal), not both in a neat bundle.