Since I was pretty on point on AF.Corrin's stats

Let's see how close I can be on Surtr's stats
To start we know he has 50 HP
Know going off of what his stats are in the story (mostly looking at hard mode book 2 13-5) I'm going to say he will probably have 44 atk, Spd will most likely be just as shitty at 15, Def I've already covered that but it's most likely 39, Res will probably be 30 or 31

So in Total 50/44/15/39/30(31) adding up to 178 (179) bst

But like always this is just an assumption so who knows if I'm right but until his stats are out my guess is still standing that he will be the start of Gen 3 Armored units just like how AF.Corrin was the start of Gen 3 in dragons