Revisiting Basic has lead to a lot of thoughts on how to “incarna-ize” it. ITs a lot more simplistic, and does not lend itself easily to it, but it can. These are some initial thoughts.
Essence 1 plus level. Only attune special objects. Any object the has magic bonuses against specific things or detects something (as if the object had senses) is special and requires attunement. Each class gets a free attunement related to their class.