It is not "not possible" to obtain. More international firms are starting to offer TCs in their Singapore offices, either by way of a hybrid programme with London, or a local TC programme. If you can't get into these places as trainees, then lateral into the Singapore or Hong Kong offices after you get called. This does mean that you need to have trained and/or practised in a relevant practice area with a reputable mid size or big four firm as the recruiters will be looking for candidates from these places. Typically, these practice areas would be corporate, banking/finance, capital markets, funds and to some extent, international arbitration. Hence, if you wish to join an international firm ultimately, choose your TC (firm and practice area) wisely.

MC, US or Cravath rates are not impossible but you need to put in substantial effort in securing a TC and subsequent qualify into a relevant practice area in a reputable mid size or big four firm. I know this may seem impossible to some of you as the competition for TCs is so stiff nowadays but you still need to do your research and try your best to gain some internship experience in the relevant practice areas to sell yourself to the hiring partners. If you don't come from a good law school with good grades or outstanding achievements or connections, the journey will be tougher but not impossible.