Recently noticed a decline of parties in Hel, so why not have something like a MVP taming item (maybe ~1-2% capture success rate) or the eggs itself through an exchange program(s) (eg. otherworld enigmatic fragment/vicious emblem/skeleton key/instance point).
My $0.02 on the poll options: quest = boring solo farming; pet tying to MVP drop = difficult for newbies to compete; wb boxes already have a long list of items; Fahrros...30-50 ppl squeeze in a small room punching Fahrros sounds messy and not fun.