The best way to camp this shield is the day after maitenance. Come back 20 hours after server up just to make sure you don't miss him. Wide scan helps, just because of the terrain where he spawns.
This is the only shield that give any stat boost to a blm or a sch at these levels(+1 int, +1 mnd, and a 15hp-mp convert). So if your a mage who is still using clubs, then take the time to get this shield, it is worth the time and effort.
Nice Shield for a BLU at 30and for awhile. Bo'Who Warmonger (Lvl 37 Quadav Paladin) is soloable at 45 on some jobs, 60 on all. Spawns around (K-10) in Pashhow Marshlands every 21hrs to every 21hrs 15min.