d20Dwarf
Explorer
Wulf Ratbane said:I tend to agree with Psion and others here that Feat chains are the way to go.
Using XP as a controlling device doesn't work very well, at least not in the "pay X to get Y" variant. It works ok for "one shot" things like creating magic items or casting powerful spells. It doesn't work at all for "permanent purchases" like Fighting Styles or (IMHO, and just as an example) the bonus Familiar abilities from Spells & Spellcraft.
In my own design work I very early threw XP costs out as a balancing mechanism. I might be tempted to reconsider XP as a balancing force if the cost was ongoing, as in the case of the %XP penalty for "abnormal" multiclassing. But I haven't really bothered to crunch the numbers on it yet simply because I prefer to balance with Feats and Skills.
XP defines character level, character level defines Feats and Skills, Feats and Skills define character abilities. I think XP is "too far removed" from character abilities to be an effective balancing factor.
Wulf
Wulf,
You may not like XP as a balancing tool, but the d20 System is rife with examples. I was thinking of magic items when I conceived of the system. True, it takes a feat to then be able to create as many magic items as you like. It takes no feat to join a school, but the abilities are hardly up to par with magic items. If you had all 10 levels in a school you MIGHT be CR+1, but then you are at least CR 18 anyway and these minor abilities are only going to be a drop in the bucket.
In the core rules I can:
Spend 160 XP to gain a semi-permanent +20 to a skill.
Spend 2000 XP to gain a semi-permanent +5 deflection bonus to AC.
Spend 1200 XP to gain a semi-permanent SR rating of 15!
Guess what, none of these raises my CR a bit. (responding to kenjib)
Gaining levels is essentially trading XP for abilities, BAB, base saves, and special abilities. The XP chart for gaining school abilities mirrors this progression.
Gaining permanent spell-like abilities requires the expenditure of XP, but does not raise your CR.
XP *is* the balancing mechanism in 3e, that's why there is now a standard progression chart, which differs from past editions. XP totals are tied into your effectiveness by showing us what kind of creatures you can fight and what level of challenges you can overcome.
This is an interesting discussion and I'd like to hear more about why you think XP is not used to balance character ability in the d20 System.