Auto-translated
One minute per battle on any map is optimal.
In my opinion, a chess timer speeds up the game because it eliminates pauses during battles and simply long periods of indecision when all moves have been made.
It also makes the game higher quality, as the initial moves of a couple of minutes allow for 20 moves when the situation requires it.
I don't see the point in setting more than a minute per battle, but I also don't see the point in reducing the first and second time to 16+6 on HL+U, for example, because it won't be possible to accumulate a lot of time, which will significantly reduce the quality of a long game. For me, a game with such a timer would turn into a race, which may be good, but as an exception in some tournaments and fun matches, not as a general rule.