Spear Throw's issue has never truly been damage but rather accuracy. Not only does the attack take into account the target's evasion skill (forcing you to use nets on high evasion NPCs, because no sane Spear build goes higher than 7 Dexterity), it also receives lighting penalties, which means you can't use it effectively in dark areas without a point blank shot or flares/molotovs. I suggest that the fixed +3 range buff be instead changed into a fixed +20% (or more) Spear Throw accuracy. The damage bonuses can remain the same.