A six-cell route along two edges
Trace IMPACT from row 6, column 4. The complete order is 1 at row 6, column 4; 2 at row 6, column 5; 3 at row 6, column 6; 4 at row 5, column 6; 5 at row 4, column 6; 6 at row 3, column 6. Those cells read I → M → P → A → C → T.
The movement is right, right, up, up, up. After two horizontal steps, the route turns once and continues vertically, producing two straight segments. It spans four rows and three columns, visits six edge cells and one corner, and ends on an open cell with two open orthogonal neighbors. In the listed solution order, these six cells leave 24 open cells for the remaining words.