User blog comment:Linathan/Unit Spotlight: Frolic Emperor Kira/@comment-5709934-20150411215736/@comment-26140304-20150411220630

Zedus offers a 125% boost to Critical damage, which is the same as Maxwell's, and a 40% boost to Spark damage. Zedus gives the player a lot more options to choose from compared to Maxwell and Kira. Also, Zedus gives the party a 15% boost to critical rate. If using double Zedus leads, your crit rate is 40%.

Kira, on the other hand, has a higher crit damage boost and elemental weakness damage boost, but the elemental weakness damage is only limited to Light and Dark units, which already gives the player very few choices to choose from. This is also provided that Elemental Changers like Shida do not work with this damage boost. Also, his 200% ATK buff on his UBB cannot be spammed since you have to keep charging Overdrive. Additionally, the 200% ATK only adds to the unit's attack, not towards damage. Spark buffs, on the other hand, boost damage, which overpowers ATK buffs.