User blog comment:KassiasGrandiel/Omni Mordlim (Idea)/@comment-24277289-20170127142148/@comment-20000744-20170131040907

ES means EX Skill. And no, "spark boost parameters" isn't in Japan yet, so I don't know how that buff is going to work. The buff is in the data, but no units have it yet. Maybe on the next batch after Randall History we'll see a spark buffer with parameter boost per spark. I don't know, we'll find out.