surprisingly well actually. At 20 in every stat (just enough dex to use it) it gets 359 uninfused and 403 mundane. However it gets 418 40/40/16/16 for a lot less levels. But if you're a high enough level to have even stats it does well mundane. It gets 478 at 99/99/16/16 and only 454 at 40 in every stat for way more levels... It's better uninfused for level efficiency, but thats true of almost every weapon ever since mundane got nerfed into the ground. At max level 99 in each stat it gets its highest AR of 506 beating uninfused, but again only at ridiculous levels. But most weapons are worse mundane even at max level for example the longsword gets 375 99/99 for only 2 max stats, whereas it only gets 362 mundane at 99 in everything. So in general mundane is pretty trash, but for the rulers sword it does have some potential.