I only have 1 plugin but it's a custom one to skip the fight/escape in the battles.
Mapping is definetly my weak spot as well. So what I did was have 1 map and used images from unsplash(a free image site) as backgrounds for the other areas. This way I only need to focus on 1 map and the rest are just scenes that playout over a parallax(shameless plug but check my game to see what I mean.) But looking at your game's page maybe that wouldn't work too well with it's visual style.