So I made it!

Was lucky with the flights:
- 5:12 CX659 landed
- 5:24 at the gate
- 5:34 in the T2 transfer bus - waited for what felt was a looong time
- 5:46 arrive at T2

Then a brisk walk to the gate! (which I always seem to get the farthest out ones everytime I fly out of Changi)