Took a while to figure out which areas were the entrance but I managed to make some progress on maps (NOT yet completed). The Ceizak portion is pretty much set I'm just not 100% sure where the border of that east tunnel is. First section of Morimar is done, but only a bit of Foret. If the walls aren't shown it's because I'm not sure if there is one so feel free to give feedback on walls etc. Keep in mind that this is a composite map (thanks to Slycer) so you can't really use it in reference to X-Y positions in game. All the little parts are broken up amongst like 25 in-game maps and they almost all take place on H-# or G-# grids. So telling your party you're at H-7 is pretty useless because every map is gonna be at H-7.
You can probably tell just by looking at that Ceizak sucks for farming plasm, it's extremely long and the mobs are far apart making long inefficient pulls. Morimar is the best area to farm plasm because the first section is one big room with a small side room with mobs. Foret is second best and has a few more mobs not as far apart as Ceizak.