Will my travel itinerary in Thailand encounter visa issues with recent immigration changes?

Bit of help needed... I am seeing that immigration is becoming a little more picky and on guard recently so I'd like to know to the best of your knowledge if the following itinerary will be an issue for me. I am from Australia

1. Came from Sydney 6th November 2018 BKK airport on visa exemption

2. Went to Singapore 3rd December 2018

3. Returned to DMK airport 11th December 2018 on 30 day visa excemption

4. Leaving for Vietnam on the 7th January 2019

5. Plan to return to DMK 14th January 2019 on 30 day visa excemption

6. Have a scheduled trip back to Sydney on the 6th February BUT plan to extend visa another 30 days in Krabi.

7. Plan to go to Cambodia 27th February 2019

8. Plan to return to Phuket Airport 2nd March 2019 on visa exemption

9. Plan to either apply for another extension or go to Singapore on the 29th March 2019

10. Return to DMK 5th April 2019 (if no extention)

11. Return to Australia 20th April.

Can I pull this off?