The Singapore-based Australian posted a three-under-par 68 for a two-day total of 10-under-par 132 to head into the third round of the 300,000 dollars full field Asian Tour event with Wisut as joint-leaders.
Scott Barr carded a 67 to stay one shot behind the duo on 133 while overnight joint-leader Ted Oh of South Korea and Philippines' Jay Bayron are tied for fourth on 134.
Flint remained on course for his career breakthrough on the Asian Tour despite having to battle the unpredictability of the wind directions which swept across the Empire Hotel and Country Club in the afternoon.
Australia's Rick Kulacz will not be defending his title after he posted two-day scores of 70 and 73 to miss the weekend cut which was set at one-under.
A total of 67 players including Singapore's amateur, Choo Tze-hung will be featuring in the weekend rounds.