Lesser Heart of the Wood before reincarnation question

I want to get all possible past life feats x3 each and go for completionist but there are some classes that I just don't want to play. I know I can do multiclass and have the class I want to get a past life and for completionist be level 11 before I reincarnate, but can I use a lesser heart of the wood +20 (or any number) and just respect to the class right before I reincarnate? That way, I don't have to use that class that I don't want while levelling to 20. Will the true reincarnation recognize the new class I picked?