What would a reasonable cost for a ring that acts either like the Archmage path ability - Component Freedom (Material components/focus):ignore focus or material component if total value is less than 100gp x your tier
or
that functions like as if you had the Eschew Materials (Mythic) feat
Benefit: You can cast any spell with a material
component costing 10 gp per tier or less without providing
that component. If you expend one use of mythic power
while casting a spell that requires a material component
costing 50 gp per tier or less, you can cast it without
providing that component. Expending two uses of mythic
power instead allows you to cast a spell that requires a
material component costing 100 gp per tier or less without
providing that component.
The ring if meant to work for a mythic kineticist and would require the Mythic Crafter (Mythic) feat.