Really? Kamhir delve takes like -25% damage to slashing but not -99%. I literally hit Wopket for single digits. Also Marjami takes -50% to magic only while casting, not -99% the entire fight. Piercing is good against Marjami boss but it's irrelevant because nobody brings anything but RNGs to that fight because melee piercing jobs would get destroyed by AoE. There's very few mobs that resist slashing and blunt but so many mobs resist piercing. What mobs resist slashing exclusively? Just Rocs? How about blunt? Just slimes? How many slimes are there in Adoulin-- also that's a non-issue for MNK because of Formless Strikes, and a non issue for PUP because of Sharpshooter and Stormwaker frames which can hit piercing/magic.