your team CAN be very powerful w/o 100/120, not to mention 120 will be later buffed to... 160? i forgot
however, your friend list (which is important here) will be saturated with good players if you draw at least one (not top whales, but still)

Amaterasu is still good hime to have, especially for new player, Ares is okay
still, if i were you, i'd reroll till Managarm. Or any other 100%