Nice mix, a few things however :

Eldritch Blast is described twice (copy-paste)

"Caster level" and "Max invocation grade" progress, but the character learns no new invocations except for the essence granted at 6th level, severely limiting progression on the warlock side (no new essences or shapes, no "utility" invocations).

Was it intended like that or should this class also stack with warlock to determine number of invocations known ?

Otherwise, love the flavour, and great picture ;-)