I'll be honest here. When doing these rankings, I tend to balance head to head with consistency. Obviously when ranked teams have played one another, that usually takes precedent and weighs heavily. I will also say however, that I like to reward the small schools who are willing to play all comers and have also displayed consistency in passing each test.
Lutheran has done so with flying colors, thus I rewarded them. They have played the second hardest schedule in 1A (behind Pioneer) according to Sagarin and still boast an average margin of victory of 41 points per game. What else can they honestly do?
Now, in this specific case, I do think that a 5A school like Valpo would dominate in the trenches and would be able to boast tons more depth than Lutheran but I still think Lutheran would have the best player on the field.