Layer Collision issue

ok i have created a very specific problem for myself and i will try to best describe it with bullet points:

• have path finding enemies that use raycasting to pathfind

• have a shield on my character to block enemy bullets

• set my shield to ignore raycast layer so the enemies dont pathfind around me

-when i fire projectiles from the player they hit the shield

so basically i need to make a way so just the player's bullets are ignored by the player's shield, but i cant use a layer cuz i need the ignore raycast layer

also i cant set my shield collider to a trigger that destroys things as that would ruin the sparks that the enemy bullets spawn

furthermore i have the enemy bullets and player bullets on the same layer so they dont collide so setting the shield to the bullet layer and ignoring raycasting would not work either...

im not sure if this problem i have made is solvable with all of these silly restrictions i created but thanks to anyone who tries to help