Heh, me versus editing is kinda funny, historically speaking.
"The avatar is almost like a separate character, with its own ability scores, hit points, feats, and skills. At 1st level, the avatar's ability scores are based on those of the champion, although the scores may be rearranged as desired for the avatar. Apply the ability score adjustments for the champion's race after arranging them. The avatar may then increase his ability scores 4 times, as if the avatar had gained a level divisible by four. Every champion class level gained thereafter, the avatar may increase one of his ability scores further; the standard increase to ability scores gained every four levels applies only to the champion's normal form."
How exactly is this supposed to work?
To revise my previous stuff ...
There are two builds, one very below average class, that transforms into another slightly better "class", that can be an outsider.
Fission, yes but what is the fission'd part, the regular Champion or the Avatar?
That Avatar is just a class ability, so the fission would be of the Champion, which could immediately use it's Avatar (su) ability.
2 cc ranks in UPD, and get a +x / +x / +x bonus item
Activate item for as many combats as possible.