What I can think of is like this:
Service 81, 82, 101, 103/103M, 317
Serangoon Ave 2, Upper Serangoon Rd (Hougang Bound), (Original
Route)
Service 100
Serangoon Ave 2, Upper Serangoon Rd (City Bound), (Original
Route)
Service 158
Serangoon Ave 2, Boundary Rd, Serangoon Central, (Original
Route)
Service 105 & 315
Serangoon Ave 2, Upper Serangoon Rd (Hougang Bound), Serangoon
Ctrl, Boundary Rd, (Original route)
Service 109
Serangoon Ave 2, Upper Serangoon Rd (Hougang Bound), Serangoon
Ctrl, (Original Route)