JoeGKushner said:
You take the fighter material as you were originally going to and then you should already have your level. If you're talking about changing things characters get in the sequence of their levels, it's a bad idea because then other people want to bend the rules.
If you're going to retro-grade a character, then go with what you were originally thinking.
I had not considered that this might be a problem with the other players some are dedicated power min/maxers.
It would just be easier not to switch in the middle of a game.