If you want to calm and memblur your way through dungeons or whatever then make a Human or High Elf who start with good innate charisma (or better yet just play an Enchanter if you want to do that sort of thing a lot). But the idea that Clerics should be dumping WIS in favor of CHA especially untwinked in classic era, is monumentally stupid. This is the same stupidity that tells people to pump STA on INT casters for an extra 50 hp at level 60, which could be offset by wearing a single HP ring. It's always better to pump your primary stat, because doing so frees you up to gear for the other stats as needed on a conditional basis (CHA to calm, resists, HP, etc...)
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