Searching for the Rune Sphere (remake)

Without changing the experience situation, the portal to the town will be inaccessible, and therefore the main character will not have time to return to the town to repel the elf attack, no matter what. It is not necessary to give level 12 immediately; it is enough to return the experience to a normal rate, add some Sundogs, various stat boosters (including those with resources - there are a lot of problems with them), and maybe add some more troops (for example, 10-15 monks). Is it really necessary to destroy all three catapults in two months, or is it enough to destroy the nearest one?! And if possible, please provide more details about the prophet's quest.