Yes i was killing different mobs, however, as far as i know, it always depended solely on skill level. It's not based on % of mob's HP either, because i dont get from x2 or x3 HP mobs more, i get less. I couldn't find any database with formula or HP recovered based on lvl except this one : http://base.l2j.ru/index.php?p=19&skid=46 (sry for link) I know it's not classic database, but i dont remember this skill ever changed.