your helper team is strong enough (even stronger than mine atm in terms of total power) so you should easily farm 12-3, it gives decent coins and gacha seeds, also ampys for your girls, and it unlocks the 80 stamina secret garden, which is a nice way of farming manyus (even better than the manyus dailys in terms of % for lvl 100 manyus) and every bonus packs a nice amount of coins and gacha seeds, i´ve been farming this for some time with no problem, just pick a decent helper and blow through 12-3 hoping for the bonus to appear.