Eric Anondson said:
So just to test out an example, however unconventional this is, I know the Hit Dice to Large is not normal... just work with me here .
+1.4 CR for Large
+0.2 CR for Giant type (for Darkvision)
+1.1 CR for Hit Dice (+2d8 above the character level hit dice)
–1.2 CR for Ability Scores (–4 to Int, –4 to Wis, –4 to Cha, –12 total)
–0.2 CR for –1 Feat
–0.1 CR for –1 Skill Point per level
Total = +1.2 CR, Rounded to +1.25 CR.
Depending on whether you are using the spreadsheet or the book, you might have to double check a couple of things that Size adjustments will change. Notably that 1.4CR for Large includes +8 STR, -2 DEX, +4 CON, +2 natural armor, -1 AC for size, -1 BAB for size. If you want to "back out" any of those automatic adjustments, make sure to account for them.
Also please note that the cost for those 2 Hit Dice includes BAB, skill points, and 1 feat.
Everything else looks like you did it right.
So what would the Level Adjustment be here for XP determination?
If you want to use LA, which I don't recommend, use +1.
The problem with LA is that, while +1 is fair for this guy at 1st level, it's not fair at 10th level, for example.
Fuindor got it right-- I recommend you use the full and exact CR of each character for determining XP by EL. This character's CR is 2.25. Factor that in along with the 1 CR for each of his "normal" first level buddies, and the total party CR is 5.25. This means that this party will receive fewer XP for a CR1 monster-- it's easier.
A normal party of four 1st level characters vs. a CR1 critter earn 75 XP each.
The party with the half ogre earns 37 XP each. (Total party power = 8.06-- more than twice as powerful.)
When you go to award XP, the giant character earns XP based on his character level-- 1st level. So he doesn't get 2.25x the amount of XP, he gets 1x the XP share, just like all the other 1st level characters.
(If you need me to explain this in greater detail-- the whole "Chi/Rho" thing-- just ask.)