How would you build the hypothetical frame, conveniently name "Meta"

Meta, short for Metamorphosis is able to transform any part of his body into any other Warframe. He can have any passive and any ability on all 4 of his blank abilities.

Two build options:

1 - only helminth skills

2 - any skill in the game (including exalted weapons)

I really want to see who can make the most busted as well as original/unique build frames.