I did noticed this when I was going to those Raid Battles in the Aether Raids to get those Bonus Items Daily. I noticed some Fire Emblem Heroes players that were customizing their own opposing units for the Defense Maps are getting blocked by the terrains placements such as Healer Terrain Objects, Fortresses, Towers, etc. and they couldn't be moved a single inch and attack the player's party and counterattack (except for Archers, Mages, and some units with Range Counters like Ike for example). I also saw a few maps that I encountered that had one unit and a lot of terrain objects blocking the opposing units way that feels that it looks like not good war tactics design and it's very winnable with stronger units available in any player's side to me. Does anyone with a good knowledge of knowing more of Aether Raids that why some Fire Emblem Heroes players are customizing like this in their own Defense Maps?