>>531693545
Its decent I would say, definetly a little greedy but not mihoyo levels from what I have gathered, I think a spark takes like 2 months, but the events and free stuff make it about 3 weeks if you are diligent and not trigger happy with your pulls.
Basically don't blow your load on everything that moves and do your homework with what characters and card you ACTUALLY want, the spending curve is relative to how competitive you want to be in PvP