I've posted this numerous times, but here goes once again.
The HFS to edit:
763FD8F12D3D013194261D98B4AEF0FB0F6FBA1B.zip
The file to edit:
npc_variations.tx*****mp
The code to find and edit (FOR EACH BOSS):
"num_flinches_to_break" "1"
This will make any weak_point attack method get the breakoff in 1 hit not just spears.
Btw this belongs in the Help section not Discussions.