IMHO - I await to be shouted down though!
What is your ideal first job? If the thought of some bush flying appeals then get back there, do the SA comm and fly 206s about for a while - something I wish I had done.
But if a UK licence and job is your goal I would:
1. Get over there and do perhaps 2/3rds of your required hour building. It's so cheap there and the flying is certainly as challenging as the UK. If you can do the SA night rating. It'll count towards the UK CPL but is far more challenging than the UK one. It also is much more IF based - I would say it compares with our IMC.
2. Come back and do your writtens.
3. Finish hour building here, trying to work towards accuracy on your navs.
4. CPL/IR here. This is perhaps where I'll be yelled at. But you asked for different views so this is mine. I have personally yet to meet someone who went to another country, got their CPL/IR then converted here smoothly and in min hours. I have around 7 mates who tried and none found it the easy, cost effective route it is made out to be. If you worked on the foreign licence it iis different - you have experience. But as a cost saving measure I don't think it adds up.
You can start the ATPL's here no bother with an ICAO PPL, which you have.
Enjoy
SK