Inaccuracies in formulas

[Lykrast]

• Vorpal at higher levels has less chance to drop if the weapon has a low Looting (formula ignores Vorpal's level if there's Looting)
• Overlevelled Vorpal does not work unless the weapon has Looting III or more
• Recall teleports less xp as it levels up (level I teleports nearly all of it, level III teleports about a third)