I just got to the ex area today. At a rate of 2-4 locations a day, I have no chance to get to 200 locations. (I am currently lv 28).

I know this may seem like a waste but if I have no chance to get to 200 locations or 50k stamps I could just take all my pero puddings and peronamin that I'm getting from cases and feed them to Kurito's nest. The cases seem to be dropping lots of these kinds of items.

10 peronamin + 10 peronamin half + 10 pero pudding half + 10 pero pudding + 10 R gacha tickets = 21,100 points (good chance for an SR).

you're close to lvl 30 (the min recommended to enter perogambit), you can at least reach all locations.

and i don't recommend to sacrifice half puddings or half peronamin due to low value for Kurito (both are pink items) and due to next event (elite guard). Only use big ones.