I have 3 vet account, should I buy 3 more new account so that when I form a new 5 boxing team, all of them will get 3x xp.

account vet A -------new account D
account vet B ------new account E
account vet C -----new account F
================= or just buy 2 new account

account vet A -----new account D and E
account vet B ----new account F

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I wonder which is a better option.