Himmat, a former winner on Asian Tour, carded an even-par 71 with three birdies and three bogeys to end with a total of eight-under 276.
Former Asian Tour number one Juvic Pagunsan romped to a commanding eight-shot victory. The 37-year-old Filipino, who held a share of the overnight lead, nailed six birdies to sign for a closing six-under 65 and a winning total of 20-under 264 at the Manila Southwoods Golf and Country Club's Legends course.
He got that back with a birdie, only to drop yet another shot on the 16th. A birdie on 17th brought him to even par and he finished at even-par 71.
Pagunsan, who had a share of the lead over night, totalled 20-under and finished eight clear of co-leader Thai Pijit Petchkasem (73), Filipino Angelo Que (72) and Nirun Sae-Ueng of Thailand, who were all at 12-under.