Some Fun Facts about 120/120 Rising colossus damage:
Colossus has 780 STR
Dmg formula for strength is 780*0.3 +5 = 239%
Tactics is 120
Dmg for tactics is 120/1.6 + 6.25 = 81.25%
Anatomy is 120
Dmg formula for Anatomy is 120/20 +5 = 65%
Total Damage increase = 385.25% (not subject to 300% dmg cap)
Base dmg is 19-24 giving the colossus a damage range of 92-116 damage before resists.
I watched my colossus do 41 consecutive Armor Ignores. Damages were as follows
92- 10 counts
97- 5 counts
101- 7 counts
106- 10 counts
111- 3 counts
116- 6 counts
Interestingly enough, no values in between, meaning base damage is rolled first (19x4.85 = 92, 20x4.85= 97, 21x4.85 =101, etc.)
Even more interesting is that Rising colossus ignores the 90% damage reduction from armor ignore, as the above values are direct multiplications of its base damage value by its damage increase.