It is actually fairly easy... once you get in the rhythem you will get the answer extremely fast... just examine the numbers closely.
Here are the numbers in pi up to 100 digits in the decimal:
1415926535
8979323846
2643383279
5028841971
6939937510
5820974944
5923078164
0628620899
8628034825
3421170679
I separated them so it was easier to attack, but if you look closely you will see the secret.
brightvale
49
it is 15
SPLWA
Kyrii.
interesting
Round 11
Scarblade.
quiggle
MAJESTIC FIRES
3943
51,200