What about the previous year when Brady had significantly more points than boldy did at the same age while being the most physical forward in hockey. There's a reason why Minnesota fans are proposing the trade.
No one in their right mind does either deal From the sens perspective.
Tkachuk age 21 season
17 goals, 36 points, 0.64 p/g
Boldy age 21 season
31 goals, 63 points, 0.78 p/g
Tkachuk age 22 season
30 goals, 67 points, 0/85 p/g
Boldy age 22 season
29 goals, 69 points, 0.92 p/g
Tkachuk age 23 season
35 goals, 83 points, 1.01 p/g
Boldy age 23 season
hasn't happened yet
Tkachuk's age 24 season was also a lower (but basically identical) p/g to Boldy's age 22 season, this past year.
Of course there's also the notion that Tkachuk has been in the league for six years now, there's a pretty good chance that he's developed all he's going to, whereas Boldy has been here for three years, and may develop further still (we can assume this is possible because Tkachuk wasn't anything more than a 45 point forward through his first three years before taking a step forward in his fourth year, which Boldy will be entering in four months).
Don't really care if no one in their right mind does this deal from a Senators perspective, but I hope this provides some insight that you didn't have previously.