A note. I went to the stronghold coordinates carrying loads of epic gear. It wasn't "safe to dig down. I died in lava.
For me the on Xbox one the middle of the stronghold library where it is safe to dig down is at.
X1027 y18 z178
Great seed, my gf and I have been playing survival here.
We found another couple dungeons.
skeleton dungeon x -1980 y 19 z -2333
Skeleton dungeon x - 2248 y 13 z -2239
Looking for the end portal now. Will post it soon