In fact I'd argue that blood proximity was the "natural succession law" at the time. That is the closest male descendant of the title/land holder would be accepted and recognised.In any case we are forgetting who Salic law in France was a much later invention (female exclusion was just for taking away the crown from little princess Jeanne and exclusion of female lines for blocking Edward III’s claim), so at the time of Anarchy would NOT exist at all.
I guess who an exclusion of females would most likely not involve males descendants from female lines and would go for blood proximity meaning who Henry II would be the direct successor of his grandfather in England