So, at first glance this is an obvious "stupid question" as the tooltip for the skill seems perfectly clear:
"Restores target's HP.
Cure potency 300
Additional Effect: Erects a magicked barrier which nullifies damage equalling 125% of the HP restored ..."
So to me is says if I cast it on a party member and they get, say, 100 HP back they'll get a shield which will absord 125HP. Makes perfect sense, right?
BUT .. and this is where my confusion arises .. during the initial solo instance you get from the Sage role quest NPC, at the point you get to fight the first 'boss' the tutorial script tells you to cast "Eukrasian Diagnosis" on the NPC to 'shield him when first engaging' .. and the script blocks progress until you do this to reinforce the point; nostalgia for Stoneskin returns /sigh.
At this stage the NPC is at full health so the spell restores ZERO HP, so what use is the shield he gets since according to the tooltip it will nullify ZERO damage, or is the tutorial misleading having you cast it pre-battle giving the IMPRESSION it will do anything when the NPC is first attacked?
As I see it for the shield to absorb any HP the tooltip must be simply badly worded when it says "... if the amount of HP restored ..." .. if that isn't the case how does the shield provide any absorption without first having restored HP?
Cheers
[edit]
I looked in the Battle Log to see what that tells me about the application of the skill, it shows when the party member GETs the buff, but there's no log line for when it's removed so I can't see any battle action that causes it to drop even though the buff icon disappears during the battle!