I suggest the Bt Timah - Changi Village Line. Lines 8 and 9
towards Changi Village, 10 and 11 towards Clementi)
BC1 Changi Village
BC2 Loyang (Between Pasir ris Dr 1 and 3)
BC3 Simei
BC4 Tanah Merah (9, 11 only)
BC5 Bedok (9, 11 only)
BC6 Kembangan (9, 11 Only)
BC7 Eunos (9, 11 Only)
BC8 Paya Lebar (9, 11 Only)
BC9 Aljunied (Late Nights Only)
BC10 Kallang (Late Nights Only)
BC11 Lavender
BC12 Bugis
BC13 Dhoby Ghaut
BC14 Somerset
BC15 Orchard
BC16 Newton (Peak Only)
BC17 Balmoral (9, 11 only)
BC18 Stevens (9, 11 only)
BC19 Botanic Gardens
BC20 Eng Neo (lines 8 and 10 stop, 9 and 11 express)
BC21 Turf City
BC22 Bukit Timah West (lines 8 and 10 stop, 9 and 11 express)
BC23 Ngee Ann Poly
BC24 SIM (lines 9 and 11 stop, 8 and 10 express)
BC25 Sunset
BC26 Clementi Ave 4 (late nights only)
BC27 Clementi
I modify it abit.