I guess there was no bolster buff to r45 in rvr at this time on test server, otherwise he had more HP, so his rank should be 40. But don't nail me down on this, he might be 41.
"->" indicates the dark magic value before and right after the cast.
lvl39:
70->95 Gloomburst: 292 dmg (before the linked time stamp in the video)
75->85 Doombolt: 585 dmg
85->100 Gloomburst: 585 dmg
100 Impending Doom: 732 dmg
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Summary:
Before we talk about the damage calculation, we have to be sure about the damage steps and their range.
Both videos show similarities in the damage values on certain verified comb/dm levels.
35 to 70 = ~300 damage 75 to 85 = ~600 damage 90(?)-100 = ~750 damage
Now I give you something to think.
Dhar levels:
1-10
11-30 31-70 71-90 91-100
Dhar level 1-10 and 11-30 have a backlash chance of 4% and 8%, so it is unlikely to get video evidence for the values.
The damage steps are quite similar to Dhar levels as you can see. Honestly I would say they are the same.
What is missing is the base damage per rank but this quite easy as we only need evidence for some ranks and use a linear interpolation.
There are 5 damage steps.
Taking the middle step as base we get:
Rank 15: 332 damage on 100 DM (~2,5x multiplier), leads to 132 base damage on that rank.
Rank 39: 732 damage on 100 DM (~2,5x multiplier), leads to 292 base damage on that rank
