i got CAIO TERRAS 111 half guard dvd, and he has one of the SICKEST moves ive ever seen (might be better but DEF have to check this out its BRUTAL)
inverted half to kimura & americana (if they defend the kimura switch to americana) to roll over sweep BACK into kimura if you want, or you can get top position....
inverted half to collar choke and sweep: another crazy-sick move+sub... its straight up DEATH if someone does it to you its SO BRUTAL, defiantly recommend checking these 2 moves out they are flashy as heck!