You want it to drop all 3 of them? if that's the case
go to /trunk/db/pre-re or re/mob.db
find:
1751,RANDGRIS,Valkyrie Randgris,Valkyrie Randgris,99,3567200,0,2854900,3114520,3,5560,9980,25,42,100,120,30,120,220,210,10,12,2,8,86,0x6283695,100,576,576,480,1427450,617,5500,603,5000,616,2000,7510,5000,2357,1600,2524,3000,2421,3000,2229,5000,7024,2500,0,0,0,0,0,0,4407,1
those set of 0, those are empty spot for items you already have the armor, then to add the shield and shoes it would go
1751,RANDGRIS,Valkyrie Randgris,Valkyrie Randgris,99,3567200,0,2854900,3114520,3,5560,9980,25,42,100,120,30,120,220,210,10,12,2,8,86,0x6283695,100,576,576,480,1427450,617,5500,603,5000,616,2000,7510,5000,2357,1600,2524,3000,2421,3000,2229,5000,7024,2500,"2115","0","2421","0",0,0,4407,1