many people confuse what RIBA accreditation really means. RIBA is just a club that goes around the world certifying that school XYZ is equivalent or better than the standard they've seen in the UK. but this is not binding in any way, nor does it carry any professional or academic recognition with it.

imagine manchester united comes here, and tells us that our football players are equivalent to the UK players. does it mean we could go there and play for them? does it mean we can get easier visas? NO. individual schools in malaysia go for RIBA mainly to get a 3rd party opinion that they are THAT GOOD. u know how people tend to say UiTM is a bottom tier university, but wait a minute, their archi school have RIBA!

singapore do not have any governing body that certifies education, because they literally have two schools of architecture. so instead, they use RIBA to give them some basic idea of the quality to expect. again, this is not binding in any ways whatsoever.

UTM students (without RIBA) have been working in singapore both after part 1 or part 2 with no restrictions. as far as SG practice is concerned, if u hold a cert that is accredited by the originating country to practice as an architect, they're happy with it. and the same can be said about entry level to NUS or NYP.

and about the UK option, i would say do it if u have the money to spend. with the current economic state, u either will put a massive debt on ur shoulder, or burden that load on ur sponsors (or parents!). but honestly, do not put any hope on being able to work there as an architect after finishing ur studies there. they say BREXIT will cause the UK to look for non-EU workers, but still we have not seen that happening yet. and there would be even less hope for local grads to land a place there immediately after graduation. they will seek at least 5-10 years experience because they have a large number of UK graduates to fill up the industry.

if u do decide to go there, then it would be advisable to look for schools that are validated by LAM. at least u can come back here and work if u cant find a place there.