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Your choice of triggers, to me as an American amateur, seems a little strange. I have never seen Wansen used or reviewed in the United States. Nor have I ever seen the Viltrox brand. The most common triggers that I have seen and used are Yongnuo and Cactus. For years, I have used Yongnuo 622s and the Yongnuo 622 TX on my Nikons with great success. Presently, I am using Yongnuo 605N II on my Sony a6000. They are completely manual and work well. The next most popular brands that I see people using are Cactus, Neewer and Cowboy Studio. These are all fairly inexpensive and readily available.
I look forward to seeing you test these in the future.