You could always use: https://rathena.svn.sourceforge.net/svnroot/rathena/trunk/db/mob_avail.txt but since you want your own stats and drops..
Do this in your jobname.lua:
[jobtbl.JT_RANDGRIS] = "RANDGRIS",
In your npcidentity.lua:
["JT_RANDGRIS"] = 2500,
and in your mob_db:
2500,RANDGRIS,Rawr,Rawr,141,1005000,1,10000,10000,3,2895,6101,588,506,196,131,125,276,267,156,10,12,2,8,86,0x37B5,100,576,576,480,0,0,0,0,0,0,0,7539,500,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
Since you're using and already pre-existing mob sprite.. you need to use it's full name and not replace it with RAWR. You only use your "Custom Name" when you get to your mob_db as I showed you in my above code.