TheNo_Named if you keep running straight you'll find a staircase that you need to break. once you get through the portal room is on the left
tbh i would hate a 12 eye, it would ruin the fun of ssg. i feel like the good part about ssg is when all the luck aligns and you get an amazing run. a 12 eye would just be reseting for dragon perch. either way we dont even know if the portal would light if there was 12 eyes full
its probably not gonna work since we need a pearl source and blaze rods, and you would need to build a portal near the coords of the stronghold, or just walk. for now the best seed is the current one.
toycat said he mightve found a better one, its probably the 9 eye
376166226 is probably the best one you can get, stronghold at spawn with village for beds. you build your nether portal at the end portal room. the nether has a bastion for pearls and a fortress right next to spawn.
ive gotten the obsidian but not enough iron to make a bucket