There's a few things to consider here...
for instance, for 50 more RP you can just buy 2 capsules and still get 80 tokens. That's 6 skin shards guaranteed, plus 2 shots at a stocking stuffer. No matter how many tokens you get from the pass, they will not get you more capsules (just master chests at best).
Also, how many tokens do you get for PVP matches and FWOTD? Basically, how much grind time do you need to invest before the pass pays off?