Zatiel was satisfied with the ranking that the A.I. Chip had created for the Law bloodlines. The deduction about the increases in battle power the Law bloodlines granted and the hypothetical outcomes of battles against other bloodlines users was not flawless.
Heinz was not a bloodline user and yet he has the power to face a Law Seeker thanks to his law comprehension and the high-grade Path Techniques he trained. If he trained the Blood Demodand Technique to the third level then he would be able to defeat a Fourth Order Law Bloodline owner.
As for the Daybreak Bloodline. Its power was not well represented in Zatiel's offensive might. The might of the bloodline was in the fact he could heal from any wound no matter how severe they were, even if they were related to his soul. It also gave him the vitality to use runic sets above his Rank for a long time.