Aspiring Novel Writer
Since its a cost for using the <Fate Sequence Perception>, he permanently loses some amount of Fate Stats but with Dante's innate Talent having the ability to absorb the Luck of the monsters he kills and converts into his own Fate Stat, its not a problem.
The Chosen in the Trial World had to go face more dangers than the remaining people on earth (after system's assimilation with earth).
It would be unfair if we only think about the opportunity that comes with assimilating with system. but if we consider the danger one have to survive among the monsters of the trial world, were one could die anytime, it's unfair for the Alpha Chosen.
it will be shown in the next 3 parts of Dante's Fate.
It was due to the Lv.24 Hobgoblin Shaman having high Fire Mastery level than the Water Mastery level of Lv.23 Fiendish Aquarine Lizardnoid. It will be explained in later chapters but since you have raised it in the comments, I gave out the reason.
Actually, no need for that. Science Channel says that Usain Bolt's speed tops out at about 10.4 meters per second. To run on water, you'd have to zip three times as fast. So around 30 meters a second. There are many other theories on it but most of them were that the running speed must be 30 m/s to run on water. So, I used that in this Chapter. Hope this clarified your query.