XWARREN,
O.K., I thought about the math a bit and now see a problem. Given the equation noted (which I see in TOM), I see the following issue with just loking at truespeak on self (I'll assume no INT modifier to keep the math simpler):
Lvl Skill DC
1 4 17
2 5 19
3 6 21
4 7 23
5 8 25
10 13 35
15 18 45
20 23 55
30 33 75
40 43 95
By the time a Truenamer reaches 10th level, if he doesn't have some bonuses to INT and/or Trueseech skill (beyond always putting points in it at every level-up) he cannot succeed in casting any utterances on himself.
By 15th level, even with allot of bonuses, the TN wont succeed in casting and by 20th level he is done.
The same holds true for casting on enemies.
It seems that this kind of progression will make it so the TN cannot cast anything on himself (by 15th level) or high level enemies.
Is this how the class is suppose to work?? It is not worth taking as utterances become useless against baddies by the time I would get to the end of the OC or in Hordes of the Underdark.