What do you mean by get legendary weapons? the mod saves the items you wear before?i mean money and etc...
it's like native, it doesn't save anything, it is used just for fun in "Short period of time", however i can make it work in CRPG though . In extra invasion you are limited to use some of the gears that is available to you. For example, if you play as Crusader vs Mongolians. You can only use crusader armor and not other armors....you can get special legendary weapons from the chest if you are lucky, its like lottery, cost 300 to roll each, then eventually you get a super weapon that you can fight against the bosses.