I now have the necessary EXP to rank up from C to B.
Proof of EXP Gain:
https://www.fairytail-rp.com/t39592-event-trick-abound-fall-equinox-fest-thread?highlight=Fall+Fest#381797
https://www.fairytail-rp.com/t39892-pumpkin-picking-gone-wrong
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P. S. Those should be enough since these two event threads together give one C rank worth exp [175 EXP] + one B rank worth exp [1050 EXP] which comes out to 1225 EXP or so whereas B rank up needs only 1200 EXP.
Proof of EXP Gain:
https://www.fairytail-rp.com/t39592-event-trick-abound-fall-equinox-fest-thread?highlight=Fall+Fest#381797
https://www.fairytail-rp.com/t39892-pumpkin-picking-gone-wrong
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P. S. Those should be enough since these two event threads together give one C rank worth exp [175 EXP] + one B rank worth exp [1050 EXP] which comes out to 1225 EXP or so whereas B rank up needs only 1200 EXP.