Given the specified difference in troops and the depth of the dungeon clearing (I understand that a significant part of the map has already been explored), the Lizardman can afford to spend a month building guilds in search of damage dealers, without worrying about a sudden endgame.
The L-size artifact is not an XL-size artifact; it allows for smaller jumps in space, and it only has one jump.
That's why I calmly submitted the save for judging, without even doubting the result. However, things turned out as they did. I sincerely thank you for your understanding.