While other schools have a spear to help them with pierce, balance is the only school who does not have a 0 pip spear charm. Currently balance only gets a spear from King Artorious, Shift Thornpaw, item cards, or Shrike. All of these are +10% spears, although Artorious is uniquely a "balance-only" spear.
For the sake of consistency, can Balancespear be made trainable? If it's a universal spear, it would be fine at +10% pierce, but a balance-only spear like Artorious would also be nice at the now standard +20% pierce value.