If you click "Apply Conditionals" the crit chance is wrong. It's assuming a maxed combo counter along with Gladiator Might's set bonus.
The actual crit chance is:
32 * (1 + 2.2 * 2 + .1) = 176%

Nerd Shit

Ignoring Armor

All heavy attacks do approximately (assuming no statuses, orange crit, and ignoring armor):
[95, 64, 98, 77] * (1 + 1.65 + 1.2) * (1 + 0.55) * 2 * (4.9 * 2) * (1 + 6) = [ 77 780, 52 399, 80 236, 63 043 ]
Impact: 77,780
Puncture: 52,399
Slash: 80,236
Viral: 63,043
Total: 273,458

Slash proc damage would do approximately (same assumptions):
0.35 * 273458 * (1 + 0.55) * (4.9 * 2) = 1 453 839
1,453,839 True Damage per Second for 5 seconds.

With Armor

Now, let's say we're going up against a non steel path level 100 Heavy Gunner which has 6,441.15 Ferrite Armor.
This means we'll have to make some changes to the numbers we got above to accommodate for the armor and health types.

The damage calculation formula can be found here: https://warframe.fandom.com/wiki/Damage#Armored_Enemies

Considering those, this build would do approximately (assuming no statuses and orange crit):
Impact:
77780 * ((300 / (300 + 6441.15)) * (1 - 0.25)) = 2 596

Puncture:
52399 * ((300 / (300 + 6441.15)) * (1 + 0.5)) = 3 497

Slash:
80236 * ((300 / (300 + 6441.15 * (1 + 0.15))) * (1 - 0.15) * (1 + 0.25)) = 3 318

Viral:
63043 * ((300 / (300 + 6441.15)) * (1 + 0.75)) = 4 909

Impact: 2,596
Puncture: 3,497
Slash: 3,318
Viral: 4,909
Total: 17,520

With the slash procs doing approximately (same assumptions):
0.35 * 17520 * (1 + 0.55) * (4.9 * 2) = 93 145
93,145 True Damage per Second for 5 seconds.

Let's replace that Heavy Gunner with a non steel path level 100 Bombard which has 6,633.85 Alloy Armor.
Now the numbers change slightly to accommodate for the new armor type.

Considering those, this build would do approximately (assuming no statuses and orange crit):
Impact:
77780 * ((300 / (300 + 6633.85)) * (1 - 0.25)) = 2 523

Puncture:
52399 * ((300 / (300 + 6633.85 * (1 - 0.15))) * (1 + 0.15)) = 3 044

Slash:
80236 * ((300 / (300 + 6633.85 * (1 + 0.5))) * (1 - 0.5) * (1 + 0.25)) = 1 467

Viral:
63043 * ((300 / (300 + 6441.15)) * (1 + 0.75)) = 4 909

Impact: 2,523
Puncture: 3,044
Slash: 1,467
Viral: 4,909
Total: 11,943

With the slash procs doing approximately (same assumptions):
0.35 * 11943 * (1 + 0.55) * (4.9 * 2) = 63 494

63,494 True Damage per Second for 5 seconds.

Conclusion

[Plague Keewar] is actually surprisingly good at heavy attacks. Combined with the zaw arcane, it's a pretty good utility and killing tool.

It is worth noting that the arcane will not proc if the enemy bleeds out. So if you're going up against very high level enemies (steel path), then Force might be better for you.