Trying to understand the concept before the math...
PCI_StatMonkey wrote:
I think attempting to equate a custom advanced spell may be an issue
the combinations you can create never seem to take place in higher tier spells...
two Tier IV spells (TN: 26) in the current (-15) system would be 37 which is a bit high (with 31 being average for a Tier 4.5 hero... 2d10(d12)+15)
two Tier I spells (TN:18) end up being 21, which for a Tier 1.5 character is not all that hard (average roll on 3d10+6)
On average I would want to see an advanced spell be the equivalent of two adaptions when two spells of equal tier are added together...
emphasis mine.
PCI_StatMonkey wrote:
Harliquinn wrote:
Then just make it "CTN equals the highest CTN + 6" Fixed.
Crushes Low tier + High tier spells..
Okay...
So, we know two things. First, you're looking for "the equivalent of two adaptions". Define what an adaptation amounts to. From my experience, they run the gamut of values between no CTN and say, +6 CTN. This is an abstract target that changes too much. Second, if one static value makes the CTNs good for low tiers but bad for high tiers and a different static value makes the CTNs bad for low tiers but good for high tiers, then this means that you must have a curve in mind. We can't be talking about linear progression. And in order to find a formula that uses non-linear progression, you're probably looking at using exponents rather than addition or multiplication.
So, with that in mind, I suggest more clearly defining the target numbers for
not only Tier X + Tier X advanced spells, but also for Tier X + Tier Y advanced spells. That will help to frame the problem, which will help define the solution.
Scott