Which brand ST tire works best depends on your trailers size and load range. Ask that type question about tires on a pickup and you get tire brand recommendations all over the spectrum. Same here.
With over 30+ members reporting Maxxis tire failures and you want to stick with another ST tire I would look at the new gen L and M speed rated ST tires like the Providers........Goodyears Endurance......Carlisle HD. Higher speed rating are more about the tires ability to shed heat ....not how fast you can run down the road.
However no more than your trailer is on the road more Maxxis will work.
Your Maxxis ST tires has a dot date code which tells you exactly how old the tires are. Go by that date. Any ST tire over 5 years old I would sell them on CL. Lawn service guys are always looking for a cheap tire for their trailers.