bolen said:
If somehow I could know exactly how these numbers were generated I could do beter
Both of these books are almost 100% OGL so I think it's OK To post these. Please correct me if I'm wrong and I'll take them down immediately.
Here is the XP-point cost progression that I am using from Buy the Numbers. It shows how much each spell slot costs to buy in XP.
0th-level slots 3 * new total 0th level spell slots
1st-level slots 5 * (new total 1st level spell slots plus 3)
2nd-level slots 10 * (new total 2nd level spell slots plus 6)
3rd-level slots 15 * (new total 3rd level spell slots plus 9)
4th-level slots 20 * (new total 4th level spell slots plus 12)
5th-level slots 25 * (new total 5th level spell slots plus 15)
6th-level slots 30 * (new total 6th level spell slots plus 18)
7th-level slots 35 * (new total 7th level spell slots plus 21)
8th-level slots 40 * (new total 8th level spell slots plus 24)
9th-level slots 45 * (new total 9th level spell slots plus 27)
Here is, from Elements of Magic, the spell point progression of a magic user using the mana point system. This is basically this book's equivalent of a Wizard in D&D.
Spellcaster Level - Maximum Spell MP - Spell Lists Known - Magic Points - Free Cantrips Per Day
1 1 6 5 3
2 2 9 11 4
3 3 11 17 5
4 4 13 26 6
5 5 15 35 7
6 6 17 45 8
7 7 19 56 9
8 8 21 68 10
9 9 23 81 11
10 10 25 95 12
11 11 27 110 13
12 12 29 130 14
13 13 31 152 15
14 14 33 177 16
15 15 35 205 17
16 16 37 235 18
17 17 39 265 19
18 18 41 297 20
19 19 43 332 21
20 20 45 370 22
This list is a bit confusing, so let me explain... the first number is the level of the spellcaster... straightforward enough. The second number is the max amount of mana a spellcaster of that level can spend on a single spell. The third number is the number of "spell lists" known, which replace spells. Spell lists were easy to convert into the Buy the Numbers system so you can ignore those numbers (I'll post the entire conversion later, but for now let's avoid adding extra numbers
). The 4th number is the number of mana points a character will have at that level. The last row is unimportant; free 0-level spells per day. But you can see that the 4th column is where I got the X-coordinates from.
I'm converting the spell slot costs into mana point costs.
So I used the buy-the-numbers system to calculate how much XP a regular core rules wizard would spend at each level on his new spell slots. Then I just subtracted to find out how many mana points the EoM wizard gains at each level. Then I divided the XP cost for the stand allotment of spell slots by the number of mana points he would gain at each level to find approximately how much XP he should spend on each mana point when within that level's range of mana points. That's how I got the Y-coordiates.
I'll attach the excell sheet I used to keep track of the numbers I wrote down.
So with x and y, I'm comparing the number of mana points a regular character would gain at each level with the average amount of XP he should be spending on each one (equivalent to how much XP a BtN wizard uses). This way I can hopefully create a decent progression chart that I can show my players to say, "Look, you have 108 mana points, your next mana point costs [certain number] XP to buy."
