According to Databook, Hiruzen surpassed Tobirama. According to thw manga, Hiruzen said he was the strongest of the team, now, is he already stronger than Tobirama?
Well yes, databook says so, Tobirama must have notice this and gave the seat of Hokage to Hiruzen.
But, is that the prime Hiruzen? Well, according to the databook, he became hokage 31 years ago, if he didn't died he would have 72 years, so 72-31=41years.
So that means he was already big and also he was already a sensei. The sannins were like 20 years old.
That is your prime hiruzen. But i will say prime Hiruzen is between 31 to 45 years.
So, the databook says that he is talented in ninjutsu, taijutsu and genjutsu, so at that age he already had the 5 points in his stats. And that age he must have at least, 4 in stamina, speed and strength.
So his stats must be minimum 37. Maybe 38 if he has 5 in stamina.