GMing D&D 4e, I got used to creating new monsters and it's been quite simple so far with the guidance of the errata and observation of the Monster Manual 3 damage expressions.
But here is something I don't quite understand.
How much is ongoing damage worth?
Technically speaking, 2d6+9 = 4d6+2 (Average damage 16)
What if I wanted to change that 2d6+9 into Xd6+Y plus Z ongoing damage?
What would be the correct numbers to keep the same average damage?
In other words, how much damage is ongoing damage woth on the average damage of a power?