devtrackers.gg
Hi Dev here!
First thank you for taking the time to report bugs.
This is how it works currently: A burn stacks have a duration in which it does damage ticks. When that duration is up every tick after that will decrease the stack count by 1. Next tick the stack count is lower and does less damage and decreases the stack count once again, until you reach zero when the brun is removed.
Adding a burn stack when en enemy is burning resets the duration before it start decreasing.
In this case the burning have started ticking down but you add a stack to it, reset the duration but end up at a different level then first.
Lets take an example.
You get 2 crits in a row and get up to 0→2→4 stacks. Then it ticks down to 4→3→2→1 stack. Then you crit, adding 2 stacks on top of that and get that to 1→3 stacks. Then you crit again and gets it up to 3→5 stacks. Since the blessing maxes out at 6 stacks if you do another crit you will go from 5 → 6.
The damage scales exponentially depending on the number of stacks so when it goes down it goes down invert exponential.
Damage is done depending on the armor type of that enemy and some other factors so burn damage will apply diffidently on different enemies. Burning on the same enemy should give the same damage ticks per stacks independent of weapon.
Example of stack damage:
Stacks - Damage vs Reaper per tick
9 - 123
8 - 100
7 - 78
6 - 59
5 - 42
4 - 28
3 - 16
2 - 8
1 - 2
All player weapon that causes burn uses the same burn-stacks and will add together. Soulblaze works in principle the same but is a different debuff so they will stack and tick individually and have different damage characteristics.
Also to give extra clarification: We had a bug where som traits got the benefit of the highest tiers even if they where lower. This was the case with the Infernus blessing and was fixed in 1.0.22.
Burning have worked the same since the closed beta and the only difference we madein 1.0.22 is fixing the bug with the blessing tiers.
EDIT: I also want to add that any other bonuses you have will be applied to fire that YOU have started. So if you give extra damage vs X from talents or weapon perks, curious etc that will be applied to the fire damage as well and might modify the damage taken by the enemy. So the above example table might not be exact correct for you depending on your loadout.
Best regards / Guen