@Jackinthegreen
We know the XP cost gets ridiculously expensive at the later levels because of this. We were trying to figure out an appropriate level for LA's so it wouldn't hinder them later on.
Dandu had an interesting idea where if they accumulated 1000xp from the penalty it buys it off. So roughly by level 4 or 5, a +1 character wouldn't have these issues anymore. Just pondering if 1000 is too little. But the system seems quite handy overall. Plus less work having to calculate the buy off.
Based on the math for a +1 LA without RHD, this 10% method is worse.
Let's go over the experience needed for levels under this system:
2 = 1100 (1000)
3 = 3300 (3000)
4 = 6600 (6000)
5 = 11000 (10000)
6 = 16500 (15000)
7 = 23100 (21000)
8 = 30800 (28000)
9 = 39600 (36000)
10 = 49500 (45000)
At 10th level he's taken a penalty of 4500 XP. Using LA buyoff, a +1 LA without RHD can buy the LA off with as little as 3000 XP. Each Racial HD increases this by 1000.
Extrapolating the math up to level 20, and including level 21 base xp for a bit of comparison:
11 = 60500 (55000)
12 = 72600 (66000)
13 = 85800 (78000)
14 = 100100 (91000)
15 = 115500 (105000)
16 = 132000 (120000)
17 = 149600 (136000)
18 = 168300 (153000)
19 = 188100 (171000)
20 = 209000 (190000)
21 = xxxxxxx (210000)
Upon attaining 20th level, this 10% character has effectively lost 19000 xp because of his LA. He could have just lost 3000 xp by buying it off.
If the LA wasn't bought off and it was played under the normal rules, the character would reach 20 class levels at 210000 xp, or just 1000 xp more than with the 10% version.
Sorry. ^^;
If the DM is awarding XP based upon each character's level, then that would certainly work.Not quite true. Since your character would be below your group's average level a lot of the time, he'd gain more XP for the same fights on average. So the 10% penalty would work out to effectively be less than 10%. Depending on when the rest of the group levels, and when you level, you might even be able to squeeze a benefit out of your penalty, strange as that may sound.
I for one award XP to each PC separately, based upon their respective level. I know many DMs don't do that, but it's not exactly uncommon, either, I believe.
Have you taken a look at Frank&K's ideas on the level adjustment thing? They still take a bit of work to make useful, and depend a lot on what creature exactly your players want to play, but I like some of their basic ideas.