Nyx well they give us the least durable pet first ... which is unfortunate. but i agree with this thread.
the 20c cost is super duper punishing 1-5 then after 10 its entirely irrelevant and easily forgotten for the rest of the game.
as the OP said either give us scaling reagent costs and reduce these to 1-3c or just entirely get rid fo them.
i'd also like to see the order we get pets revised.
fire > air > water > earth would be ideal
fire > earth > air > water would be my second request.