This seed would be a good challenge.. Moder being surrounded by plains is ok.. I mean 2 of the locations you are only in the plains for a few seconds likely.. Iron is a bit away..

The seed I'm on now was a little too easy.. we had like 6 iron crypts and 2 bosses on our starting island.. the third boss was directly across from our first island.. kinda blew through the first 3 biomes. Then we had to go to like 8 islands to find the sigil/stone to find Moder. I really enjoy exploring so it was nice to actually have to use the boat and go on a trip lol.