Michael Silverbane
Adventurer
My advice is to give him Hit Dice in the place of his empty Level Adjustment levels. This is what I do in my own games...
Each level of a level adjusted character is replaced with a d4 Hit Die, which grants 2+Int modifier skills per level, poor BAB, and all three poor Saves, as well as any feats, ability score increases, and so on that would normally go along with those Hit Dice.
Alternatively, since it is a solo campaign, and balance between characters is no issue, you could treat his as a 1st or 2nd level character, rather than using the full +3 Level Adjustment.
Each level of a level adjusted character is replaced with a d4 Hit Die, which grants 2+Int modifier skills per level, poor BAB, and all three poor Saves, as well as any feats, ability score increases, and so on that would normally go along with those Hit Dice.
Alternatively, since it is a solo campaign, and balance between characters is no issue, you could treat his as a 1st or 2nd level character, rather than using the full +3 Level Adjustment.