warband 1
chieftan spear bow horse 61
12 haradrim raiders (4 bow 8 spears) 132

warband 2
chieftan spear bow horse 61
12 haradrim raiders (4 bow 8 spears) 132

warband 3
chieftan spear bow horse 61
12 haradrim raiders (4 bow 8 spears) 132

warband 4
chieftan spear bow horse 61
5 haradrim raiders (2 bow 3 spear) 55

700 points (695)
45 bodies
8 might
18 bows
all cavalry
for SBG

the numbers are pretty good for a cavalry army, though you might want to give the chieftains war spears in stead of spears.
And maybe swap on of the chieftains for Suladan.

_________________
"make me lunch... worthy of Mordor"

i was thinking about suladan though he's 40 points more