Striking = Monk
Maiming = Dragoon

Pretty much they made 2 str accessories sets. If your a monk you can only roll need on striking if your a drg you can only roll need on maiming although they are viable on both str jobs. When EX primals came out they switched over to a system of having striking only accessories and both drg and monk could need on them.

Would be nice in future coil like 6-9 if str accessories have only 1 set so the loot tables aren't filled with them like 1-5.