Will I face immigration issues in Thailand with my planned visa strategy?

Hello

I was in Thailand 4 months before I went back home, with 2x border run and one extension since didn't know you could get extension every time you left. But my question now is I have now booked my flight back for 180 days. And my plan include 1x tourist visa with one extension and fly out come back after few days then do visa exemption + extension after that it's already new years and can do new border runs. Will I get issues with immigration? Or if they ask to my return flight shall I show them my flight to Cambodia instead of my flight home? Thanks in advance