Auto-translated
Thank you for your opinions. Of course, if you play precisely, quickly, without mistakes, and remember the mutual location of a dozen or so neighboring spawns, objects, and guards, then 8 minutes, and possibly even 6, will be enough. Also, in my opinion, a natural and reasonable desire not to make changes to the rules is important.
By the way, even a chess timer with 16+8+1 allows you to save time – if you don't send waves of golems on the first turn, of course. On the first turn, the difference is mainly made, and on the second, with luck, half a dozen angels and a viv altar can save you with a quick cast. But these are laboratory conditions...