Help: Should i open or slot arc werewiger

[Nova Alia]

Hi guys i am a rogue, bought an arc werewiger for its aa. Is it better to open it or should i slot it on a different pet? And if so which ones?
Since i am out of money, Would it be good on lancealot? Or any mythic pets?
Thankyou for help

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[Polosam]

Slot

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[Heist]

Slot better since the only thing good about it is AA