Fire Emblem Heroes Legendary Hero Battle Sakura : In Full Bloom (Abyssal, Shadow Dragon/Mystery)

Legendary Hero Battles with restriction is a good challenge. My usual standard setup for all restriction is having Two Armored (Near save and Far save build, if possible self-sustaining units), one healer and whoever else that can dish out damage for the 4th spot. I keep the group as tight as possible so the two tanks can protect the healer and the offensive one. For Shadow Dragon restriction, I had for a long time Tiki with Far Save and Sheena with Near save, but I recently got the Halloween Nagi with Far save, so I added Near Save and Pavise to Tiki since she is a better character than Sheena, plus her harmonized skill can be used more than once per map. I had a forma Maria Ritual Sacrifice with dazzling shift so she can cross the wall and join the armored units to the right at the beginning as well as Emblem Marth that also has to cross the wall to rejoin the group on the right. The rest is just tanking everything, healing at the right time and attack a few times with Maria for some debuffs, using also the Harmonized at the right time and using Marth to clear the units that the Armored ones cannot clear. All that while keeping the group as tight as possible so that the healer and your glass canon must never be left unprotected by either of the Near Save/Far Save skills.