Arcanotechnician lvl 18 core ability: Curative Admixture: Cure Critical Wounds heals less damage than advertised.
official description: 6d8+8, affected by artificer knowledge: potions
observed effect: 4d6+8+7, not affected by artificer knowledge: potions
tested on: halfling artificer 18
devotion 100 (40 sora kell, 51 arcanotechnician, 9 heal skill) + 100 base = 200%
observed values (criticals halved, sorted from lowest to highest):
divided by 2 to get base value (200 total devotion)
Note that basic CCW spell at CL7 in ddo heals for 4d6+8+7, average 29 damage (min 19, max 39) - perfect fit for the observed data
Also note that combat admixture:CCW currently says 6d8+8 (average 35) and also that the effect should be affected by artificer knowledge potions
on an artificer 18, this is +5 caster levels.